Structural and Photoluminescent Properties of Near-Infrared Emissive Bis(2,3-Diphenylbenzoquinoxalinato)(2-Pyrazinecarboxylato)ridium(III): Structural and Photoluminescent Properties of Near-Infrared Emissive Bis(2,3-Diphenylbenzoquinoxalinato)(2-Pyrazinecarboxylato)ridium(III)