Platinum complexes bearing normal and mesoionic N-heterocyclic carbene based pincer ligands: syntheses, structures, and photo-functional attributes

Autor:	Kang‐Heng Chao, Bing-Jian Sun, Abbas Raja Naziruddin, Wen-Shu Hwang, Chen-Shiang Lee, Agnes H. H. Chang, Wan-Jung Lin
Rok vydání:	2016
Předmět:	010405 organic chemistry Ligand Mesoionic chemistry.chemical_element 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Pincer movement Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Pyridine Pincer ligand Platinum Acetonitrile Carbene
Zdroj:	Dalton Transactions. 45:5848-5859
ISSN:	1477-9234 1477-9226
Popis:	Platinum complexes featuring pyridine bis-N-heterocyclic-imidazol-2-ylidene/-mesoionic-triazol-5-ylidene donors as pincer ligands and chloro (-Cl), acetonitrile (-NCCH3) or cyano (-CN) groups as auxiliary ligands are prepared as highly strained organometallic phosphors. X-ray structures of four of these complexes confirm a distorted square planar geometry, where the pincer ligand and its mesityl wingtips occur in a twisted conformation to each other. Electrochemical and photophysical characterization have been carried out and the experimental results are interpreted with the aid of density functional theory calculations. Emission responses of complexes under exposure to different vapors and mechanical shear are reported. Notably, the platinum complex featuring pyridine bis-imidazol-2-ylidene and a weakly donating acetonitrile auxiliary ligand exhibited strong aquachromic and mechanochromic emission responses, showing color changes from sky blue to green or yellow-green.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d345e6960ce200c18c901ffc37311b5 https://doi.org/10.1039/c5dt04770f Zobrazit plný text záznamu