Copper Iodide and Copper Cyanide MOFs used in Photophysical Applications
Metal-Organic Frameworks MOFs are highly porous materials with well-defined, 3-D ordered structures. Due to their structural and functional tunability, these advanced materials have widespread applications in gas storage and separation, catalysis, optics, and many others.
Copper (I) iodide is a p-type semiconductor having a band gap of about 3.1 eV. The product can be used for photophysical applications. The CuI based MOF, Bis(N,N’-dimethylpiperazine)tetra[copper(I) iodide] (29-0550) CAS 1401708-91-5, has also attracted attention. This product consists of (CuI)4 nodes with bridging N,N′-dimethylpiperazine ligands1.
Product 29-3015 CAS Number: 928170-42-7 Bis(1,4-diazabicyclo[2.2.2]octane)tetra(copper(I) iodide) (CuI)4(DABCO)2, is also a Cu4I4 cluster, but it is linked with the bi-functional DABCO ligand. The product displays bright luminescence both at room temperature and at 77 K.
Another copper MOF, (Hexamethylenetetramine)penta[copper(I) cyanide] (29-0565)3 CAS1042093-98-0 also displays interesting luminescence behaviour. This copper complex is a 3D photo luminescent, very densely-packed, network of tetradentate ligands.
Luminescence of (CuCN)5(HMTA):)a) spectra at 298, 77 and 4 K; (b) photos (left to right) room light/298 K, UV light/298 K, UV light/77 K.
Having both high and low energy bands, 29-0565 displays luminescence, of varying intensity, ranging from green to orange at ambient temperatures (see image). The l max excitation range is 282 and 304 nm, and the l max emission range is 417 to 522nm.