A new structural class of mixed-carbene cyclometalated iridium complexes with intense, high-purity blue luminescence are described.

Here we report five blue-phosphorescent platinum bis-phenylacetylide complexes with an investigation of their photophysical and electrochemical attributes.T hree of the complexes (1-3)a re of the general formula cis-Pt(CNR) 2 (C CPh) 2 ,i nw hichC NR is av ariably substituted isocyanide and CCPh is phenylacetylide. These isocyanide complexess erve as precursors for complexes of the general formula cis-Pt(CNR)(ADC)(CCPh) 2 (4 and 5), in which ADC is an acyclic diaminocarbene installed by amine nucleophilic addition to one of the isocyanides. All of the complexes exhibitd eep blue phosphorescence with l max~4 30 nm in poly(methyl methacrylate)(PMMA) thin films. Whereas isocyanide complexes 1-3 exhibit modestp hotoluminescence quantum yields(F PL), incorporation of one acyclic diaminocarbene ligandr esults in at hree-fold to 16-fold increasei nF PL while still maintaining an identicaldeep blue color profile.

Photoacids like substituted naphthalenes (X = OH, NH3+, COOH) are aromatic in the S0 state and antiaromatic in the S1 state. Antiaromaticity relief explains why some are more photoacidic than others.

The photoinitiated radical polymerization pathway of MILRad polymerization towards its ability to polymerize a variety of vinyl polar functional monomers is investigated.