Abstract
Solid solution featuring mixed valence in metal-organic coordination polymer (MOCP) is rare. Inspired by the flexibility of Pb2+ to undergo cation exchange, and its ability to adopt a variety of coordination numbers (CN) and chemical environments (CE), herein we report the first, to our knowledge, hetero-valent, single and multiple substituted MOCP with cation vacancy featuring tunable photoluminescence, which may pave a way towards a tunable, functional MOCP. The 3D Pb MOCP features 1D moiety which contains three unique Pb2+ sites, each with a different CN and CE, that can undergo cationic substitutions with exogenous divalent as well as aliovalent, e.g. mono- or trivalent cations under appropriate conditions. The formation of solid solution is confirmed by Single Crystal and Powder X-ray Diffractions, SEM-EDS, ICP-OES, as well as XPS. A tunable photoluminescent (PL) color exhibiting good antennae effect and retention of original 3D Pb host color is observed using as little as 6 wt% of Eu3+ dopant. More importantly, the PL intensity of Eu3+ substituted Pb MOCP increases as dopant amount increases even up to 80 wt% doping, a rather rare case and the first, to our knowledge, in MOCP solid solution.
Original language | English (US) |
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Article number | 120948 |
Journal | Journal of Solid State Chemistry |
Volume | 279 |
DOIs | |
State | Published - Nov 2019 |
Keywords
- Cation vacancy
- Doped metal organic coordination polymer
- Hetero-valent
- Photoluminescence
- Solid solution
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry