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First Examples of Near‐Infrared Luminescent Poly(methyl methacrylate)‐Supported Metallopolymers Based on Zn 2 Ln‐Arrayed Schiff Base Complexes
Author(s) -
Miao TieZheng,
Feng WeiXu,
Zhang Zhao,
Su PeiYang,
Lü XingQiang,
Song JiRong,
Fan DaiDi,
Wong WaiKwok,
Jones Richard A.,
Su ChengYong
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402015
Subject(s) - luminescence , chemistry , chromophore , methyl methacrylate , schiff base , copolymer , ligand (biochemistry) , singlet state , lanthanide , polymer chemistry , quenching (fluorescence) , methacrylate , crystallography , photochemistry , fluorescence , polymer , excited state , materials science , ion , organic chemistry , optoelectronics , biochemistry , receptor , physics , nuclear physics , quantum mechanics
The first examples of Wolf Type II Zn 2 Ln‐containing metallopolymers poly{MMA‐ co ‐[Zn 2 ( L ) 2 (4‐vp) 2 Ln(NO 3 ) 3 ]} (Ln = La, Nd, Yb, Er, Gd; H 2 L = N , N′ ‐bis(salicylidene)ethylene‐1,2‐diamine; 4‐vp = 4‐vinylpyridine; MMA = methyl methacrylate) are obtained from the controlled copolymerization of heterotrinuclear Zn 2 Ln‐arrayed complexes [Zn 2 ( L ) 2 (4‐vp) 2 Ln(NO 3 ) 3 ] (Ln = La, 1 ; Ln = Nd, 2 ; Ln = Yb, 3 ; Ln = Er, 4 ; Ln = Gd, 5 ) with MMA. The strong and characteristic near‐infrared (NIR) luminescent Ln 3+ ‐centered emission for each of the PMMA‐supported poly{MMA‐ co ‐[Zn 2 ( L ) 2 (4‐vp) 2 Ln(NO 3 ) 3 ]} (Ln = Nd, Yb, Er) hybrid materials is retained with somewhat higher intrinsic quantum yields than those of the respective Zn 2 Ln‐arrayed complex. Especially for poly(MMA‐ co ‐ 3 ), which has more efficient sensitization from both ligand‐centered singlet ( 1 LC) and triplet ( 3 LC) states of the chromophores, the concentration self‐quenching of Yb 3+ ‐based NIR luminescence could be effectively prevented.