Quartier des peupliers

We selected the [listingCount] homes worth renting in this location

Book a stay in one of the best homes in [destination]

Satellite / Cable TV

Entertainment

Rain Shower

Hair Dryer

Toiletries

Bathroom

Dishwasher

Freezer

Pod Coffee Machine

Fridge

Oven

Stove

Kitchen

Coffee Maker

Kitchen Utensils

Cooking Essentials

Bread Maker

Kitchen & Dining

Washing Machine

Dryer

Iron

Ironing Board

Hangers

Cleaning Products

Drying Rack

Bedroom & Laundry

Wi-fi

Laptop Friendly Workspace

Internet & Office

Central Heating

Heating & Cooling

Buzzer / Wireless Intercom

Lift Access

Parking Available

Free Parking On Premises

Free Parking On Street

Single-Level Home

Private Entrance

Parking & Access

Balcony

Garden

Outdoor

Smoke Detector

Carbon Monoxide Detector

Other

Located in Ivry-sur-Seine – just outside Paris’ centre – this modern apartment offers a calm and comfortable base from which to explore the city and its wider area. 
 
Wood floors, vibrant pops of colour and contemporary furnishings create a warm welcome in the open-plan living area, bathed in light thanks to the glass doors that open up onto a private balcony. Start mornings here over fresh coffee and croissants while taking in the wide-sweeping skyline views, or gather here at night for a celebratory glass of French wine – you may even spot Disneyland’s fireworks in the distance. 
 
With a pair of comfortable bedrooms and a sleek bathroom boasting a rainfall shower, you’ve got everything you need for a carefree stay. 
 
Outside of your home, both Parc Kellermann and Fort d'Ivry are a twenty-five-minute walk away, while Chinatown is twenty minutes away on foot. You’re also a thirty-minute Metro ride from the Panthéon, and just under forty-five minutes from the Eiffel Tower by Metro too. 


Pierre & Marie

Microwave

Cot / Crib

Child Friendly

Colourful and comfortable, this is an excellent Parisian base for a family. It’s in the friendly Croulelarbe district in the 13th arrondissement, with excellent transport links to the rest of Paris – the Louvre is just eight Metro stops away. There are restaurants nearby, but you’ll also have a kitchen to cook in. The open-plan kitchen, dining, and living space is the heart of the home, and also where guests nine and ten will sleep (on a sofa bed). 

Murals in Paris

Netflix

Bathtub

Luxury Bedding

Black-Out Blinds

Extra Pillows and Blankets

Electricity Adaptors

Desk / Workplace

Air Conditioning

Multiple Sets of Keys

Paid Parking On Street

Welcome Hamper

Umbrellas

Nice to haves

Fire Extinguisher

Housed in a beautiful Haussmann building, this is a sophisticated, well-decorated home in the affluent 13th arrondissement. Close to the Latin Quarter, the neighbourhood is fairly untouched by tourists, and consequently very quiet. Locally, there are many typical bistros, cheery cafés, and bakeries to sink your teeth into, while it's just a stone's throw away from Olympiades station with good links into the centre of Paris – hop on the metro and be at the Panthéon and Luxembourg Gardens in less than half an hour. The apartment itself is bright and elegant, thanks to the belle époque decor and styling. Not to mention the ornate wall mouldings, antique furnishings and wrought-iron balcony that will transport you back to a bygone era of masquerade balls and 15th-century grandeur. Your host is warm and welcoming to boot, making this a great choice for those guests who are planning a long, enjoyable stay under the City of Lights. 

White Cocoon

Library of Books

Cafetiere

High Chair

Toaster

Kettle

Paid Parking On Premises

Wheelchair Access

Step-Free Access

Self Check-in / Check-out

Outdoor Seating

Install yourself in this stylish Parisian apartment, located south of the Seine, close to the catacombs and Montparnasse. While the tenth-floor location might not be a match for the nearby sixty-storey Montparnasse Tower on paper, the panoramic views from the balcony give its observation deck a run for its money without the €20 entrance fee. From here, you can catch a glimpse of some of the city's best-known landmarks, including the Eiffel Tower, Sacré Coeur, Val de Grâce chapel, and the Panthéon.

Step through the front door and enter into an effortlessly stylish mid-century pad with floating bookshelves, stunning pendant lighting and a super chic forest green kitchen with a tiled worktop – all set within the open living space.

Vast sliding doors frame the vista and offer easy access to the private balcony that runs the entire width of the apartment. Glance down, and you'll notice that the flat overlooks an interior garden, placing some distance between your sleeping space and the street – perfect for a romantic city escape.

Elsewhere, a spacious bedroom offers a soothing sanctuary to retreat to at the end of the day, while the sleek walk-in shower room continues the theme from the kitchen, with green and white tiles throughout.


Parisian Panorama

Desk

Paid Parking

Just take in the panoramic views of the Eiffel Tower and the Paris skyline from this studio apartment. The kitchen here is compact but has everything you probably need for creating some home-cooked cuisine, and there are plenty of restaurants and cafes nearby. Located in the 13th arrondissement, you’ll be within walking distance of a couple of green spaces including the Jardin des Plantes and the Parc Montsouris. And when you want to explore the rest of the city, the nearby public transport links are great.

Eiffel Panorama

Smart TV

Record Player

Sound System

Blender

Private Washing Machine

First Aid Kit

Looking for a chic home away from home in Paris? This modern two-bedroom apartment is located in a laid-back district with excellent public transport links to whisk you around the rest of the city. Explore nearby gems like the Jardin des Plantes, catch a show at the Accor Arena, or join the locals for an evening drink along the Seine. Back home, unwind with a film or your favourite playlist in the stylish and cosy interiors. With dedicated spaces to dine, work and truly relax, this home has everything you need for an authentic Parisian stay. 


By The Quai

Luxury Toiletries

Vacuum Cleaner

Rooftop Terrace

Spread across four floors in south Paris, we've decided that this effortlessly cool address will appeal to those that like their homes with a bit of creative energy.

For starters, the high ceilings, stark white walls and tall windows give the communal living room the bright and airy feel of an artist's studio, while the copious amount of natural light draws attention to the quirky design choices, from the wire armchairs and repurposed fireplace to the upright piano.

A major perk comes in the shape of the two terraces, one down at ground level and another up on the rooftop. Both are filled up with potted plants and make for lovely spaces in which to relax after being out on the busy city streets.

The surrounding thirteenth arrondissement is certainly a quieter corner of Paris, but there are plenty of distractions to be found nearby. Chinatown is only a quarter of an hour's walk away, while the Catacombs take twenty minutes to reach for when you fancy a subterranean tour.

Mother's Day

DVD Player

Fireplace

Herb Garden

Balcony / Patio

Enter Dieulafoy street and into this beautiful home boasting a relaxing, sun-filled garden space, complete with plenty of seating, billowing flowers and slatted screens for added privacy. This house would be ideal for a family or group of friends looking to take advantage of this haven of peace in the heart of Paris. Looking around the decor you'll notice vintage touches, pastel green walls and floral patterns that paint the quintessential romantic picture of Paris. Gather around the grand piano for a sing-along together, unwind in a bright and calming living room with soft thoughtful furnishings, and sit down for lunch in the charming dining area benefitting from tasteful artwork and a homely Italian feel. When you go out, make sure to take the ten-minute wander over to the Butte aux Cailles - it's a lovely place with a village-like atmosphere that is quiet by day and lively at night, with plenty of restaurants and bars lining the streets. Elsewhere, the iconic Pantheon is a thirty-five-minute walk for those who fancy stretching their legs and seeing the sights. 

Safe Haven

Enjoy impressive Parisian views with a stay in this 14th arrondissement apartment. There are two balconies and it’s possible to catch a glimpse of the Eiffel Tower sparkling in the distance. You’ll find plenty of space for socialising and relaxing, while two of the bedrooms have desks – making this a great option for remote workers. Your host is on hand to help organise a range of extras including airport transfers and grocery deliveries. Plus, it’s just a short stroll to sights like the Catacombs of Paris and the Paris Observatory, while the great public transport links make it easy to explore further afield. 

Midnight Blue Views

Once a printing house, this sleek duplex apartment embodies the artistic and stylish vibes of the 13th arrondissement. With the nearest bus stops and metro stations just steps away, you'll be exploring Paris just moments after you drop your bags. The Pathé Les Fauvettes and the Galerie des Gobelins are just over the road, along with a wide selection of restaurants in the surrounding streets to help you satisfy any and all cravings. There's plenty of room here for four, with a luxurious en-suite and wonderfully minimal open-plan living space. The second bedroom is more compact, but you'll have a cot here if you're travelling with little ones, making it extra practical.

The Clarisse

Located in the heart of Paris, this apartment is an ideal base for an extended family or group of friends visiting the city. Granted, at full occupancy two people will sleep on the sofa bed in the living room, which is fairly cosy, and the third bedroom is accessed via a steep, narrow staircase. Still, it’s a small price to pay for this home’s enviable location. Next to Place de l'Italie, you’ll find an array of boutiques, French eateries and markets on your doorstep. And for trips further afield, metro stations are within walking distance, so hopping across the city is a breeze. 

Parisian Melody

Beach Essentials

A home where simplicity is key. The decoration has been done with a minimalist's precision and boils down to a perfect white canvas packed full of clean and modern furniture. A lovely home to rest your head after a weary day in Paris, although not super well-connected you will definitely feel a million miles away from the hustle and bustle of the city centre, just overlooking the Parc Montsouris;

Blank Spaces

Situated on Île Saint-Louis, this apartment is a striking distance from Notre Dame, the Latin Quarter, and the Seine. We love how much sunlight there is here, and the contemporary decor meshes perfectly with the original character features. The kitchen is well-appointed if you fancy rustling up meals at home, both bedrooms are roomy and bright, and two bathrooms mean that nobody will have to share. Factor in the proximity to cafes, restaurants, and the neighbourhood's famous ice cream shop, and it more than ticks our boxes.

Isle of Hope

Patio / Terrace

Music lovers will adore this home's location – it's just a three-minute walk to Opéra Bastille and a minute more to Place de la Bastille. Or take a stroll along the Canal Saint-Martin to Port de l'Arsenal Garden (two minutes on foot). Alternatively, the beautiful Place des Vosges, the oldest planned square in Paris, is a ten-minute walk. Of course, there are plenty of stylish eateries on your doorstep to enjoy too.

Back at this apartment, if you don't fancy eating out, rustle up some salmon en papillote in the sleek kitchen. Then, take in the wonderful views over the Bastille and the Canal Saint-Martin from this home's large balcony – it's the perfect spot for a glass of Champagne. You can admire the vistas from the elegant living room too – we love this light and bright room with its French doors. This place really sings.



Roméo Et Juliette

Just a six-minute stroll from the Luxembourg Gardens, this beautifully-equipped home offers an idyllic base for families and large groups. It sits in one of Paris’ most historic neighbourhoods, the fifth arrondissement, home to the majestic Panthéon and the quaint Latin Quarter – take an eighteen-minute stroll toward the Seine River and you’re right at the heart of its winding cobbled streets brimming with delectable eateries and storied bookshops.

You’ll immediately fall in love with the exquisitely renovated interior. Inside, it’s all parquet floors and lofty ceilings, adorned with majestic timber beams and large windows ushering in floods of sunlight, creating a free-flowing ambience of calm. The stylish decor exudes Parisian elegance, and we love the open-plan living space. With its plush upholstery and sleek kitchen, fully-equipped with home chefs in mind, it's the perfect place to unwind with your clan. After a restful slumber in the sumptuous bedrooms, spend mornings roosted at the dining table, sipping quick coffees and tucking into croissants before slipping out to explore the city.

Saving Grace

24-Hour Front Desk

Experience island life in Paris – this studio apartment is located on the Île de la Cité. You can go for walks along the River Seine or visit the Sainte-Chapelle or Notre Dame – both are within walking distance. Alternatively, cross the Pont Neuf and browse the art at the Louvre Museum. Housed in a beautiful building, this air-conditioned studio offers views over the Parisian skyline. We also love the character features such as the stone walls and beams. All in all, this place has everything you need for a comfy stay in the City of Light. 

Parisian Skyline

Located in the heart of Saint Germain-des-Prés, this home is perfectly placed for a large group on a Parisian adventure. Granted, as a group of ten, two people will sleep on the sofa bed in the living room, but it’s a small price to pay for this home’s location. With each bedroom boasting an en-suite, there will be no queue to get ready in the mornings, either. Locally, enjoy a morning jog or fresh-air-filled stroll through Luxembourg Gardens, mere steps away from the front door

Paris at Play

Espresso Machine

Sitting in a central spot to the south of the Seine, we're sure that you'll be just as smitten with this bright apartment as we are. There's a simply huge amount of natural light from the windows and doors that line the living space and this shines rather nicely off the stark white walls, wooden floor and sleek kitchen surfaces.

While it may not have the Haussmanian period charm of other homes in the French capital, the furnishings and finishes are all contemporary – even a little minimalist so in places – and there are no parts that we can identify as needing some urgent love and attention. There's plenty of room to kick back and relax after some serious sightseeing, while the smartly designed kitchen is plenty big enough should you decide you need a night off the city's famous restaurants.

Whenever you choose to leave the home, you'll be immediately greeted by the building's plant-filled courtyard, which is a pleasing pocket of green in the heart of the metropolis. Beyond that, it's easy to stroll over to some well-known attractions, including the Luxembourg Gardens and Les Invalides.

Polished Perfection

With the Jardin du Luxembourg just a short stroll away, this apartment’s location is perfect for those who want to stop and smell the roses. The Panthéon, Notre Dame, and the Louvre are also within walking distance – now that's convenient for sightseeing. We love the leafy views from the living space, which accommodates guests five and six on a sofa bed here. Each bedroom has its own marble en-suite and a desk as well – ideal if you’re here on business or leisure. 

Le Soleil D'Or

With wood panelling and parquet flooring, this chic Parisian pad certainly holds an air of elegance. Perfect for a family or group of friends on a getaway in the French capital, this home has everything needed for a comfortable stay. And, with each bedroom boasting its own en-suite, there will be no queue to get ready in the mornings. Location-wise, you can enjoy Luxembourg Gardens, Saint-Sulpice Church and the Saint-Germain-des-Prés district, along with trendy eateries, bars and boutiques – you’ll never be lost for something to do. 

Paris Jewel

In the eaves of a characterful Haussmann building, this apartment makes a cosy base for couples. Upon entering, you're greeted by original wooden beams, A-frame ceilings, and elegant details. The kitchen has all you need to rustle up dinner – though plenty of gourmet eateries are nearby – while the living area is awash with natural light. Best of all is the location. Situated on the Île de la Cité, you'll be just a short walk from Notre Dame Cathedral, the Seine, and a metro station. All in all, we can't think of a better spot for two.

Île of Delights

Sauna

Wellness & Fitness

Just a stone’s throw from Paris’ oldest square, Place des Vosges, this apartment has a wonderfully central location. You’ll be in the heart of the city, with the boutiques, restaurants, and cultural hotspots of the Marais on your doorstep. You’ll also have easy access to the metro, so exploring further afield is as easy as can be. The apartment is simple in style but is well-equipped and comfortable – and even boasts a sauna. Is there anything better than relaxing in the heat after a busy day out? 

Pampered Paris

Interiors are as stylish as they come at this light-filled apartment – but we’d expect nothing less for a home perched in the chic Bonne-Nouvelle district. An excellent option for those looking to work in Paris, both bedrooms have a dedicated desk space to keep on top of emails and the Metro is just a three-minute walk away should you need to blaze a trail to another corner of the city for a meeting. Here for the sightseeing? Head for the thriving pedestrian cobbled street of Rue Montorgueil – a food lover’s delight. Or wander over to Le Marais or Le Louvre – both within easy walking distance.

 Bonne-Nouvelle Dream

Baby Bath

Heated Towel Rail

Laundry Supplies

Pets Allowed

Pets

Elegant and oh-so-stylish, this is a perfect Parisian base. It’s a hop, skip, and a jump from Jardin des Tuileries, and a few minutes from the Louvre, Opéra, and the Seine – you couldn’t ask for a better location. When you’re not out exploring Paris, you’ll love having such a luxurious place to call home. You'll likely spend most of your time in the open-plan living and dining space, which leads to a wraparound balcony – where better to enjoy your morning coffee? This space is where two guests will sleep on sofa beds – you might have a fight on your hands if you're vying for the main bedroom and its dreamy en-suite. 

Parisian Pyramids

This bright apartment is less than 500 metres from Notre Dame – how's that for central? You'll be based in the artsy Latin Quarter, famous for its cafes, bookshops, and the Sorbonne students who make this area their stomping grounds. Though pocket-sized, this pad is perfectly formed for couples or small groups, offering a sofa bed for guests three and four. Juliet balconies showcase the picturesque streets (and add a touch of character), while the sleek kitchen has you covered for meals at home. It's well-connected to the rest of Paris, too – two different metro stations are within easy reach.

Alabaster Wonder

This apartment is located in one of the city's most iconic neighbourhoods, Saint-Germain des Prés. There are many attractions within walking distance such as the Jardin du Luxembourg and the Hôtel des Invalides, as well as boutiques and top-quality restaurants to discover. Talking of dining – this home’s kitchen is on the compact side, but it has everything you need for cooking some French cuisine and there’s a dining table in the living room. This space also accommodates two more guests on a sofa bed. We think this place is an ideal pied-à-terre for exploring this slice of Paris and beyond.

Contemporary Delight

Situated in the Notre-Dame-des-Champs district, you'll be just a short stroll from the famous Jardin du Luxembourg when you stay at this apartment.  There are a variety of shops and restaurants nearby, too, and the Panthéon is also within walking distance. With plenty of room to relax, cook and dine, the bright and airy open-plan living space also sleeps guests three and four on a sofa bed. You'll have everything you need here for a memorable stay in the City of Light.

Jardin Chic

Just steps from the Jardins des Archives Nationales, you’ll find this apartment. There are plenty of museums and art galleries within walking distance of this home too, so it has a perfect address for culture lovers. Overlooking a communal interior courtyard, this ground-floor apartment has a sunroom for dining, while the bright kitchen is well-equipped for when you want to do some home cooking. The separate living room accommodates guests five and six on a sofa bed and for the hot summer months, you’ll be glad to know there’s air conditioning here.

Jardins & Galeries

Although the location is great, we’ll start with the apartment itself – you can see why with views like this. The vistas from the balcony over the Eiffel Tower, River Seine and the Quai des Orfèvres are fantastic. The open-plan living room and main bedroom have a wonderful outlook too. Now about the location – the home is situated on the exclusive Île de la Cité, so there are plenty of riverside strolls to be had. The nearby iconic Notre-Dame de Paris is also a short walk away, while across the Pont Neuf, you’ll find the Louvre Museum.

Eiffel View

Courtyard

Nestled in the heart of l'Île St Louis and tucked away in a quiet courtyard lies this kooky abode. Sprawling across three floors with a quaint courtyard, there's something truly relaxing about this hidden-away home. Although the distribution with a bedroom in the basement may not be to everyone's taste, the conservatory-style kitchen is the jewel in this home's crown - large enough to both cook and entertain.



L'Orangerie

Soak up the bohemian spirit of Paris in this cosy Marais apartment. Le Marais has more pre-revolutionary buildings left intact than any other area in Paris. It’s full of winding streets lined with boutiques, bakeries, and art galleries. There are countless eateries to choose from, but if you prefer to dine in, this apartment has a fully equipped kitchen. It’s a charming home-from-home – you can look forward to exposed stone walls and wooden beams combined with a designer sofa and a silk Persian rug. Two guests can sleep on the mezzanine level if they don’t mind the low ceiling – otherwise, the sofa bed is plenty comfortable. 

Bohemian Parisians

Just a short stroll from the iconic Louvre Museum, the Jardin des Tuileries and the Palais Royal – the location couldn’t be much better if you’re looking for a cultural break. Other attractions within walking distance include the Place de la Concorde and the Centre Pompidou. Back at this serviced apartment, the decor is elegant, especially in the open-plan living space (this room also sleeps guests five and six on a sofa bed). This home is an exceptional place to stay in the City of Light.

Louvre Elegance

Exceptionally located on the Île de la Cité, this apartment puts Notre Dame at your fingertips. Cafes and eateries abound in the Latin Quarter (ideal as the kitchen here is a little small and lacks a table), or you can stroll along the river towards the Louvre, Eiffel Tower, and other landmarks if sightseeing tickles your fancy. Though the design is simple, the lounge is filled with light – and the views of the tree-lined Seine are a real highlight. It's the perfect base for couples keen to be in Paris' beating heart.

Seine Skyline

Situated on the Île de la Cité, you’ll be surrounded by the River Seine – so this apartment is perfect for relaxing riverside strolls. Or visit the nearby iconic Notre-Dame de Paris, while across the Pont Neuf, the Louvre Museum waits to be explored. Afterwards, relax in this elegant apartment with its views over the Quai des Orfèvres – the large windows allow the light to flood in. This place has a bathtub, too – perfect for a soak after a busy day exploring the city.  

Paris, Mon Amour

There are an array of attractions within walking distance of this apartment in Saint Germain including Les Invalides and the Jardin du Luxembourg. Some of Paris's leading museums are accessible on foot too – the Musée Rodin, Musée d'Orsay, the Musée de l'Orangerie and the Louvre to name just a few. With so much to see and do, you’ll be glad of a comfy and stylish home to return to. The living space is light and bright thanks to French doors leading to a Juliet balcony – this room also has a sofa bed for guests seven and eight. We love that each bedroom has an en-suite and two have a desk – perfect for when you need to work while away.

Musée Light

Workplace

Nestled in the 5th arrondissement, this cosy apartment brings comfort and ease to a fantastic location. Outside, it’s less than a ten-minute walk to Notre-Dame Cathedral and you’ll be spoiled for choice when it comes to local markets, cafes and restaurants. It’s worth noting you’ll be able to hear street-noise due to the location, but the apartment is well-equipped and perfectly sized for couples and solo travellers. There’s a handy sofa bed for two guests in the living room and the bathroom comes with a sauna to ensure optimum relaxation. Your host is also on hand to help organise extras like a welcome pack and airport transfers. 


The Stone Embrace

DVD Library

Home Cinema Setup

They say it's possible to live in Paris' 6th arrondissement without ever needing to take the metro elsewhere - this quarter includes some of the most famous areas in the city and heaps of attractions. This certainly applies to this charming two-bedroom apartment niched in the chic but bohemian Saint Germain-des-Prés. You'll find yourself surrounded by bakeries, bistros and boulevards and only a stone's throw away from the Luxembourg Gardens. 

Spring in Saint Germain

Safe

You'll find this stylish apartment in the Latin Quarter, a stone's throw from sidewalk cafes, eateries, and shops. The location is perfect for exploring – there's a metro station nearby, or, for a slower pace, you can set off on foot. We love the contemporary design and sleek living space. It's a bit small overall but perfectly well-equipped with the must-haves. Just note that two guests will sleep on a sofa bed – if you'd like ample room to socialise, we'd suggest a maximum occupancy of four.

Pearl & Taupe

Paris’ 1st arrondissement isn’t number one for just any old reason. Home to the Louvre/Palais-Royal neighbourhood, this is a historically lavish part of the city where you'll find some of the biggest attractions. A four-minute walk from the Palais du Louvre itself, this apartment certainly continues on a majestic theme. Through a courtyard full of lush plants, the entrance to this building has the famous cream-coloured walls of Parisian homes that you’d expect. However, the interiors tell another story. A rich orange sofa welcomes you to the modern living space – with exposed brickwork, a glossy tiled breakfast bar, and a full-length glass partition wall to break up the bedrooms. While frosted windows save your modesty, there’s nothing modest about the decor of the rooms. Find striking floral feature walls, jazzy cushions, gilded mirror frames, and a freestanding tub in one of the en-suites – it’s bourgeois-bohemian at its best. Take a crisp, morning walk to the Jardin des Tuileries after your café au lait (it’s only ten minutes from home). The Louvre–Rivoli metro is just a two-minute walk, so you can also head out to discover any areas of Paris. You might find it hard to leave your surrounding area though – with boulangeries, restaurants, and bars aplenty, you can dine out or feast like a king in your sumptuous apartment.

The Salvager

When you stay at this apartment in the 5th arrondissement, you'll be only a few metres away from the Jardin du Luxembourg, Panthéon and Sorbonne University. Also nearby is the Rue Mouffetard, with various restaurants, shops, cafés, and a permanent open market. This spacious home, situated on the ground floor, and accessed directly from the street, is ideal for a family, friends or business travellers. Bear in mind, though, that there's only one bathroom for six guests at full capacity.

Book a stay in one of the best homes in Quartier des peupliers

We selected the 4180 homes worth renting in this location

Who's coming along?

Home spotlights in Quartier des peupliers

We selected the top 3% holiday homes in Quartier des peupliers

Most popular homes in Quartier des peupliers

Check upcoming rates & availability for Quartier des peupliers

Frequently asked questions