Coordination-driven fluorescent J-aggregates in a perylenetetracarboxylate-based MOF: permanent porosity and proton conductivity

Sikdar, Nivedita ; Dutta, Dipak ; Haldar, Ritesh ; Ray, Turjya ; Hazra, Arpan ; Bhattacharya, Aninda Jiban ; Maji, Tapas Kumar (2016) Coordination-driven fluorescent J-aggregates in a perylenetetracarboxylate-based MOF: permanent porosity and proton conductivity Journal of Physical Chemistry C, 120 (25). pp. 13622-13629. ISSN 1932-7447

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Official URL: http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b043...

Related URL: http://dx.doi.org/10.1021/acs.jpcc.6b04347

Abstract

Here we report the synthesis and structural characterizations of a new 3D functional metal–organic framework {[K8(PTC)2(H2O)1.5]·4H2O}n formed by the self-assembly of KI and chromophoric linker perylenetetracarboxylate (PTC). The structure determination shows a 3D pillared-layer framework, where perylene cores are arranged in an unusual end-to-end off-slipped and zigzag arrangement directed by KI–carboxylate bonding. Photophysical studies revealed a broad absorption band with λmax of 531 nm and bathochromically shifted red emission centered at 655 nm. This characteristic emission has been assigned due to J-coupling of the PTC linkers in the solid state. The framework contains 1D water-filled channel, and the desolvated framework shows permanent porosity, “as realized by type-I CO2 adsorption profile at 195 K. Interestingly, the guest and coordinated water molecules in the framework are connected via H-bonding and based on these characteristics, the framework was further exploited for proton conduction. It shows remarkable conductivity of 1 × 10-3 S cm-1 under ambient conditions (98% RH) with low activation energy.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:109253
Deposited On:22 Dec 2017 10:17
Last Modified:26 Dec 2017 06:31

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