NDLI: Synthesis, structural diversity and fluorescent characterisation of a series of $d^{10}$ metal–organic frameworks (MOFs): reaction conditions, secondary ligand and metal effects

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhang, Wei Hong Dong, Zhe Hou, Lei Shi, Qi Zhen Wang, Yao Yu Jin, Jun Cheng Huang, Wen Huan
Description	Author Affiliation: Zhang WH ( Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069, P. R. China.)
Abstract	Along with our recent investigation on the flexible ligand of $H_{2}ADA$ (1,3-adamantanediacetic acid), a series of $Zn^{II}$ and $Cd^{II}$ metal–organic frameworks, namely, $[Zn_{3}(ADA)_{3}(H_{2}O)_{2}]_{n}·5nH_{2}O$ (1), $[Zn(ADA)(4,4′-bipy)_{0.5}]_{n}$ (2), $[Zn_{2}(ADA)_{2}(bpa)]_{n}$ (3), $[Zn_{2}(ADA)_{2}(bpa)]_{n}$ (4), $[Zn_{2}(ADA)_{2}(bpp)]_{n}$ (5), $[Cd(HADA)_{2}((4,4′-bipy)]_{n}$ (6), $[Cd_{3}(ADA)_{3}(bpa)_{2}(CH_{3}OH)(H_{2}O)]_{n}$ (7), and $[Cd_{2}(ADA)_{2}(bpp)_{2}]_{n}·7nH_{2}O$ (8) have been synthesized and structurally characterized (where 4,4′-bipy = 4,4′-dipyridine , bpa = 1,2-bis(4-pyridyl)ethane and bpp = 1,3-bis(4-pyridyl)propane ). Due to various coordination modes and conformations of the flexible dicarboxylate ligand and the different pyridyl -containing coligands, these complexes exhibit structural and dimensional diversity. Complex 1 exhibits a three-dimensional (3D) framework containing one-dimensional (1D) $Zn^{II}–O–C–O–Zn^{II}$ clusters. Complex 2 exhibits a 2D structure constructed by 1D double chains based on $[Zn_{2}ADA_{2}]$ units and a 4,4′-bipy pillar. Complexes 3 and 4 possess isomorphic 2D layer structures, resulting from the different coordination modes of carboxylate group of ADA ligands . Complex 5 features a 2D $4^{4}$ layer in which ADA ligands and $Zn^{II}$ atoms construct a 1D looped chain and the chains are further connected by bpp ligands . Complex 6 is composed of 1D zig-zag chains that are entangled through hydrogen-bonding interactions to generate a 2D network. Complex 7 is a rare (3,5)-connected network. Complex 8 possesses a 3D microporous framework with lots of water molecules encapsulated in the channels. The structural diversity of the complexes perhaps mainly results from using diverse secondary ligands and different metal centre ions, and means the assistant ligand and metal centre play important roles in the design and synthesis of target metal–organic frameworks. This finding revealed that ADA could be used as an effective bridging ligand to construct MOFs and change coordination modes and conformational geometries in these complexes. The thermogravimetric analyses, X-ray powder diffraction and solid-state luminescent properties of the complexes have also been investigated.
ISSN	14779226
Issue Number	11
Journal	Dalton Trans.
Volume Number	40
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2011-03-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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