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Isostructural Metal–Anion Radical Coordination Polymers with Tunable Phosphorescent Colors (Deep Blue, Blue, Yellow, and White) Induced by Terminal Anions and Metal Cations
Author(s) -
Yong Guoping,
Li Yingzhou,
She Wenlong,
Zhang Yiman
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201101621
Subject(s) - isostructural , phosphorescence , chemistry , photochemistry , ligand (biochemistry) , deprotonation , metal , coordination complex , crystallography , ion , crystal structure , organic chemistry , fluorescence , biochemistry , physics , receptor , quantum mechanics
Five phosphorescent metal–anion radical coordination polymers based on a new anion radical ligand generated by in situ deprotonation of a stable zwitterionic radical are described. The N,O,N‐tripodal anion radical ligand links metal cations, which leads to five isostructural coordination polymers, [M 3 (bipo −. ) 4 (L) 2 ] n (M=Cd or Mn, Hbipo −. =2,3′‐biimidazo[1,2‐ a ]pyridin‐2′‐one, L=Cl − , HCOO − or SCN − ). The isostructural coordination polymers exhibit novel one‐dimensional spirocycle‐like structures. Three isostructural Cd II coordination polymers display unusual phosphorescent color changes (blue, yellow, and white) induced by terminal anions. Significantly, the Cd II coordination polymer with terminal Cl − possesses moderate quantum yield, and shows a bright white‐light phosphorescence emission, which is independent of excitation wavelength and can even be excited by visible light. Upon adjusting the metal cation to Mn II , two isostructural Mn II coordination polymers reveal deep‐blue‐light phosphorescence emissions that are independent of terminal anions. As radical‐based coordination polymers, some of them show antiferromagnetic interactions between radical species or radical and metal center.