TY - JOUR
T1 - Synthesis, characterization, and photophysical properties of first heterobinuclear Zn-Ln (Ln = La, Nd, Eu, Gd, Tb, Er, and Yb) Complexes Based on Asymmetric Schiff-Base Ligand
AU - Zhao, Shunsheng
AU - Liu, Xiangrong
AU - Lü, Xingqiang
AU - WONG, Rick W K
N1 - Funding Information:
This work is funded by the National Natural Science Foundation of China (21103135, 21073139), Open Foundation of Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecular Chemistry at Northwest University (2010025), Natural Science Basic Research Plan in Shaanxi Province of China (Program No. 2011JQ2011), Cultivation Foundation of Xi’an University of Science and Technology (Program No. 2010QDJ030), Scientific Research Program Funded by Shaanxi Provincial Education Commission (Program No. 12JK0622), and Hong Kong Research Grants Council (HKBU 202407 and FRG/06-07/II-16) in P. R. of China.
PY - 2013/2/1
Y1 - 2013/2/1
N2 - With a novel asymmetric Schiff-base zinc complex ZnL(H 2 L = N-(3-methoxysalicylidene)-N-(5-(4-cyanophenyl)-3-methoxysalicylidene) phenylene-1, 2-diamine), obtained from phenylene-1, 2-diamine, 3-methoxysalicylaldehyde, and 5-(4-cyanophenyl)-3-methoxysalicylaldehyde, as the precursor, a series of heterobinuclear Zn-Ln complexes [ZnLnL(NO 3) 3 (CH 3 CN)] (Ln = La, 1; Ln = Nd, 2; Ln = Eu, 3; Ln = Gd, 4; Ln = Tb, 5; Ln = Er, 6; Ln = Yb, 7) were obtained by further reaction with Ln(NO3)3 · 6H2O. Photophysical studies of these complexes show that the strong and characteristic NIR luminescence with emissive lifetimes in the microsecond range has been sensitized from the excited state of the asymmetric Schiff-base ligand due to effective intramolecular energy transfer.
AB - With a novel asymmetric Schiff-base zinc complex ZnL(H 2 L = N-(3-methoxysalicylidene)-N-(5-(4-cyanophenyl)-3-methoxysalicylidene) phenylene-1, 2-diamine), obtained from phenylene-1, 2-diamine, 3-methoxysalicylaldehyde, and 5-(4-cyanophenyl)-3-methoxysalicylaldehyde, as the precursor, a series of heterobinuclear Zn-Ln complexes [ZnLnL(NO 3) 3 (CH 3 CN)] (Ln = La, 1; Ln = Nd, 2; Ln = Eu, 3; Ln = Gd, 4; Ln = Tb, 5; Ln = Er, 6; Ln = Yb, 7) were obtained by further reaction with Ln(NO3)3 · 6H2O. Photophysical studies of these complexes show that the strong and characteristic NIR luminescence with emissive lifetimes in the microsecond range has been sensitized from the excited state of the asymmetric Schiff-base ligand due to effective intramolecular energy transfer.
KW - asymmetric Schiff base
KW - near-infrared
KW - sensitization and energy transfer
UR - http://www.scopus.com/inward/record.url?scp=84873295763&partnerID=8YFLogxK
U2 - 10.1080/00387010.2012.692427
DO - 10.1080/00387010.2012.692427
M3 - Journal article
AN - SCOPUS:84873295763
SN - 0038-7010
VL - 46
SP - 109
EP - 116
JO - Spectroscopy Letters
JF - Spectroscopy Letters
IS - 2
ER -