Redox-Active Metal-Organic Frameworks: Highly Stable Charge-Separated States through Strut/Guest-to-Strut Electron Transfer

Sikdar, Nivedita ; Jayaramulu, Kolleboyina ; Kiran, Venkayala ; Rao, K. Venkata ; Sampath, Srinivasan ; George, Subi J. ; Maji, Tapas Kumar (2015) Redox-Active Metal-Organic Frameworks: Highly Stable Charge-Separated States through Strut/Guest-to-Strut Electron Transfer Chemistry - A European Journal, 21 (33). pp. 11701-11706. ISSN 0947-6539

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Official URL: http://doi.org/10.1002/chem.201501614

Related URL: http://dx.doi.org/10.1002/chem.201501614

Abstract

Molecular organization of donor and acceptor chromophores in self‐assembled materials is of paramount interest in the field of photovoltaics or mimicry of natural light‐harvesting systems. With this in mind, a redox‐active porous interpenetrated metal–organic framework (MOF), {[Cd(bpdc)(bpNDI)]⋅4.5 H2O⋅DMF}n (1) has been constructed from a mixed chromophoric system. The μ‐oxo‐bridged secondary building unit, {Cd2(μ‐OCO)2}, guides the parallel alignment of bpNDI (N,N′‐di(4‐pyridyl)‐1,4,5,8‐naphthalenediimide) acceptor linkers, which are tethered with bpdc (bpdcH2=4,4′‐biphenyldicarboxylic acid) linkers of another entangled net in the framework, resulting in photochromic behaviour through inter‐net electron transfer. Encapsulation of electron‐donating aromatic molecules in the electron‐deficient channels of 1 leads to a perfect donor–acceptor co‐facial organization, resulting in long‐lived charge‐separated states of bpNDI. Furthermore, 1 and guest encapsulated species are characterised through electrochemical studies for understanding of their redox properties.

Item Type:Article
Source:Copyright of this article belongs to John Wiley & Sons, Inc.
Keywords:Electron Transfer; Host-Guest Systems; Metal-Organic Frameworks; Photochromism; Redox-Active Systems.
ID Code:117728
Deposited On:30 Apr 2021 09:29
Last Modified:30 Apr 2021 09:29

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