TY - JOUR
T1 - Effective enhancement of near-infrared emission by carbazole modification in the Zn-Nd bimetallic Schiff-base complexes
AU - Zhao, Shunsheng
AU - Liu, Xiangrong
AU - Feng, Weixu
AU - Lü, Xingqiang
AU - WONG, Wai Yeung
AU - WONG, Rick W K
N1 - Funding Information:
This work is funded by the National Natural Science Foundation of China ( 21103135 , 21173165 , 20871098 , 21073139 ), The Program for New Century Excellent Talents in University from the Ministry of Education of China ( NCET-10-0936 ), The research fund of Doctoral Program of Higher Education of China ( 20116101110003 ), the State Key Laboratory of Structure Chemistry ( 20100014 ), the Open Foundation of Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education of China), the Natural Science Basic Research Plan in Shaanxi Province of China ( 2011JQ2011 ), the Education Committee Foundation of Shaanxi Province ( 11JK0588 ), Xi'an University of Science and Technology ( 2010023 ), and Hong Kong Research Grants Council ( HKBU 202407 and FRG/06-07/II-16 ) in P. R. of China.
PY - 2012/6
Y1 - 2012/6
N2 - With ZnL 1 or ZnL 2 from the simple Salen-type Schiff-base ligand H 2L 1 (H 2L 1 N,N′-bis(3-methoxysalicylidene)-ethylene-1,2-diamine) or the carbazole-modified Salen-type Schiff-base ligand H 2L 2 (H 2L 2 N,N′-bis(3-methoxy-5-{2-[4-(N-carbazyl)- phenyl]-ethynyl}-ethylene-1,2-diamine) as the precursor, two series of four bimetallic ZnLn complexes (Ln=Nd(1 or 3), Ln=Gd (2 or 4) are obtained, respectively. The photophysical properties results showed that the sensitization from the excited state ( 1LC and 3LC) of the ligand H 2L 1 or H 2L 2 and the effective energy transfer of Zn 2+-Schiff-base (ZnL 1 or ZnL 2) to the Nd 3+ ion for the NIR luminescence were realized, respectively. Especially through the cabarzole modification, the improved NIR luminescence of the ZnNd complex 3 was observed due to the realization of the energy level's match of the excited state of the chromophore to the Nd 3+ ion's exciting state.
AB - With ZnL 1 or ZnL 2 from the simple Salen-type Schiff-base ligand H 2L 1 (H 2L 1 N,N′-bis(3-methoxysalicylidene)-ethylene-1,2-diamine) or the carbazole-modified Salen-type Schiff-base ligand H 2L 2 (H 2L 2 N,N′-bis(3-methoxy-5-{2-[4-(N-carbazyl)- phenyl]-ethynyl}-ethylene-1,2-diamine) as the precursor, two series of four bimetallic ZnLn complexes (Ln=Nd(1 or 3), Ln=Gd (2 or 4) are obtained, respectively. The photophysical properties results showed that the sensitization from the excited state ( 1LC and 3LC) of the ligand H 2L 1 or H 2L 2 and the effective energy transfer of Zn 2+-Schiff-base (ZnL 1 or ZnL 2) to the Nd 3+ ion for the NIR luminescence were realized, respectively. Especially through the cabarzole modification, the improved NIR luminescence of the ZnNd complex 3 was observed due to the realization of the energy level's match of the excited state of the chromophore to the Nd 3+ ion's exciting state.
KW - Carbazole modification
KW - Enhanced NIR luminescence
KW - Sensitization and energy transfer
KW - ZnNd binuclear Schiff-base complex
UR - http://www.scopus.com/inward/record.url?scp=84862802270&partnerID=8YFLogxK
U2 - 10.1016/j.inoche.2012.02.010
DO - 10.1016/j.inoche.2012.02.010
M3 - Journal article
AN - SCOPUS:84862802270
SN - 1387-7003
VL - 20
SP - 41
EP - 45
JO - Inorganic Chemistry Communications
JF - Inorganic Chemistry Communications
ER -