TY - JOUR
T1 - Synthesis, structural characterization and photophysical studies of luminescent Cu(I) heteroleptic complexes based on dipyridylamine
AU - Wu, Fengshou
AU - Tong, Hongbo
AU - Wang, Kai
AU - Wang, Zheng
AU - Li, Zaoying
AU - ZHU, Xunjin
AU - WONG, Wai Yeung
AU - WONG, Rick W K
N1 - Funding Information:
The authors are grateful for the financial support of the Scientific Research Foundation of Wuhan Institute of Technology (grant no. K201542 ), Wuhan Science and Technology Talent Training Program of Chenguang Project (grant no. 2015070404010190 ). X. Zhu thanks the financial support from Hong Kong Baptist University ( FRG2/14-15/034 and FRG1/14-15/058 ).
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Neutral mononuclear Cu(I) complexes based on 2,2′-dipyridylamine (dpa), formulated as [Cu(dpa)X(PPh3)] (X = Cl (A4), Br (A5), I (A6)), monocationic mononuclear Cu(I) complexes with counterion BF4-, i.e. [Cu(dpa)(PPh3)2](BF4) (A1), Cu(dpa)(DPEphos)(BF4) (A2) and [Cu(dpa)(Binap)](BF4) (A3), where DPEphos = bis [2-(diphenylphosphino) phenyl] ether, Binap = 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl, have been prepared and characterized by 1H NMR, mass spectroscopy and single-crystal X-ray analyses. Their photophysical properties in both CH2Cl2 solution and PMMA (poly(methyl methacrylate)) film have been investigated. All the complexes display a typical metal-to-ligand charge transfer absorption band in the region of 350-400 nm, and a broad and featureless luminescence at room temperature. Specifically, their emission maxima vary from 494 to 562 nm in the PMMA films due to the different electronic characteristics of the auxiliary ligands. Additionally, the thermogravimetric analysis shows that those complexes chelated with diphosphine ligands have a higher thermal stability than those with triphenylphosphine or halides ligands.
AB - Neutral mononuclear Cu(I) complexes based on 2,2′-dipyridylamine (dpa), formulated as [Cu(dpa)X(PPh3)] (X = Cl (A4), Br (A5), I (A6)), monocationic mononuclear Cu(I) complexes with counterion BF4-, i.e. [Cu(dpa)(PPh3)2](BF4) (A1), Cu(dpa)(DPEphos)(BF4) (A2) and [Cu(dpa)(Binap)](BF4) (A3), where DPEphos = bis [2-(diphenylphosphino) phenyl] ether, Binap = 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl, have been prepared and characterized by 1H NMR, mass spectroscopy and single-crystal X-ray analyses. Their photophysical properties in both CH2Cl2 solution and PMMA (poly(methyl methacrylate)) film have been investigated. All the complexes display a typical metal-to-ligand charge transfer absorption band in the region of 350-400 nm, and a broad and featureless luminescence at room temperature. Specifically, their emission maxima vary from 494 to 562 nm in the PMMA films due to the different electronic characteristics of the auxiliary ligands. Additionally, the thermogravimetric analysis shows that those complexes chelated with diphosphine ligands have a higher thermal stability than those with triphenylphosphine or halides ligands.
KW - Crystal structures
KW - Cu(I) complexes
KW - Luminescence
KW - Photophysical properties
UR - http://www.scopus.com/inward/record.url?scp=84951819771&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2015.12.003
DO - 10.1016/j.jphotochem.2015.12.003
M3 - Journal article
AN - SCOPUS:84951819771
SN - 1010-6030
VL - 318
SP - 97
EP - 103
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
ER -