Dual-Emission Luminescence of Magnesium Coordination Polymers Based on Mixed Organic Ligands

Presented herein are two luminescent magnesium coordination polymers (Mg‐CPs), namely [Mg2(H2O)2(2‐NDC)4(1,10‐phen)2] (1) and [Mg2(H2O)(1,4‐NDC)2(1,10‐phen)] (2), in which 2‐NDCH=2‐naphthalenecarboxylic acid, 1,4‐NDCH2=1,4‐naphthalene dicarboxylic acid, and 1,10‐phen=1,10‐phenanthroline. Based on th...

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Bibliographic Details
Published in:Chemistry : a European journal 2016-01, Vol.22 (4), p.1334-1339
Main Authors: Wu, Zhao-Feng, Tan, Bin, Deng, Zhong-Hua, Xie, Zai-Lai, Fu, Jing-Jing, Shen, Nan-Nan, Huang, Xiao-Ying
Format: Article
Language:English
Subjects:
Chemistry
Chips
Coordination polymers
Diodes
Effectiveness
Emission
Excitation
Fabrication
Ions
Ligands
Light effects
Light emitting diodes
Luminescence
Luminous efficacy
Magnesium
Naphthalene
organic-inorganic hybrid composites
Photoluminescence
Photons
Polymers
White light
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Summary:Presented herein are two luminescent magnesium coordination polymers (Mg‐CPs), namely [Mg2(H2O)2(2‐NDC)4(1,10‐phen)2] (1) and [Mg2(H2O)(1,4‐NDC)2(1,10‐phen)] (2), in which 2‐NDCH=2‐naphthalenecarboxylic acid, 1,4‐NDCH2=1,4‐naphthalene dicarboxylic acid, and 1,10‐phen=1,10‐phenanthroline. Based on the mixed ligands, the title compounds exhibit linker‐based photoluminescence (PL) properties thanks to the unique configuration of the Mg2+ ions. The two compounds show interesting dual emission on excitation of the different luminophores of the mixed linkers. In particular, the emissions of compound 2 could be tuned from green to yellow simply by varying the excitation energies. Furthermore, 2 could be excited by using a commercial λ=450 nm blue LED chip to generate white‐light emission, which allows the fabrication of a white‐light‐emitting diode (WLED) with 20 lm W−1 luminous efficacy. This work may provide a new method for designing tunable PL CPs by using the low‐cost and abundant magnesium ion. Get coordinated: Two dual‐emission luminescent magnesium coordination polymers were prepared based on mixed ligands. The emission of one compound could be simply tuned by varying the excitation energy, and could be excited by using a commercial λ=450 nm blue LED chip to generate white‐light emission with 20 lm W−1 luminous efficacy (see figure).
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201503877