REST API "GetUserProfilePropertiesFor" doesn't work

Hi everybody,

i'am trying to get user properties (UserUrl, PictureUrl) using REST API "GetUserProfilePropertiesFor", but it doesn't work. Please anybody provide a "work"-example! Thanks a lot!

The examples I got from next page (see 6. Get Multiple UserProfile Properties for Specific User).

I tried also another simple way: 

var x = "i:0#.w|sp20130\demo";
		jQuery.ajax({
		  url: _spPageContextInfo.webServerRelativeUrl + "/_api/sp.userprofiles.peoplemanager/getuserprofilepropertyfor(accountame=@v, propertyname='PictureURL')?@v='"+x+"'",
		  type: "GET",
		  headers: { "accept": "application/json;odata=verbose" },
		  success: function (data) {
				var result = data.d;
				console.log(data.d);
			},
			error: function (err) {
				alert(JSON.stringify(err));
			}
		});

Every time I receive back a error - "Bad request".

At this moment I have only one idea - it is a wrong url (problem with encoding of login name).

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UPDATE! SOLUTION:

var accountName = "sp20130\\demo";
		jQuery.ajax({
			url: siteUrl + "/_api/SP.UserProfiles.PeopleManager/GetPropertiesFor(accountName=@v)?@v='" + encodeURIComponent(accountName) + "'",
			method: "GET",
			headers: { "Accept": "application/json; odata=verbose" },
			success: function (data) {
				console.log(data.d);
				var pictureUrl = data.d.PictureUrl;
				var userUrl = data.d.UserUrl;
				...
			},
			error: function (data) {
				console.log(JSON.stringify(data));
			}
		});