Supramolecular charge transfer nanostructures

Abstract

Supramolecular organization of π-conjugated chromophores into well defined nanostructures has gained much attention due to their promising role as active components in organic electronics. Charge-transfer (CT) nanostructures, in which aromatic donor (D) and acceptor (A) molecules are alternately arranged, (mixed stack) have emerged recently as prospective candidates in this direction, because they provide inherent, uniform doping conducive for excellent conducting properties. The present perspective highlights the importance of charge transfer (CT) based non-covalent interactions, with emphasis on supramolecular design principles, for construction of various CT nano-architectures. The whole article is divided into three parts themed on the type of interactions used for obtaining CT assemblies. Through some of our recent results, we have attempted to highlight the latent potential of this nascent field. Furthermore, we have presented our perspectives on the major challenges in this field which is expected to broaden the scope of this subject.

Supramolecular ferroelectrics

“…Generally, subsequent CT ferroelectrics would benefit from incorporating other non-covalent interactions, such as hydrogen bonding, which may coax CT complexes into non-centrosymmetric structures. Creating a supramolecular scaffold such as a hydrogen-bonded network, within which CT pairs can be embedded 35,36 , may also be promising. This approach could be modular and versatile -two key qualities required for rapid technological progress.…”

Tetrapeptide–coumarin conjugate 3D networks based on hydrogen-bonded charge transfer complexes: gel formation and dye release

“…13 According to the newly published review on supramolecular charge transfer nanostructures by Subi J. George et al, the GVGV-Cou gel could be considered as hydrogenbonded CT complexes. 11 Although the formation of such CT complexes prohibits the occurrence of the photoaddition reaction of the coumarin group in the present work, which is critical for preparing light stimuli-responsive drug delivery materials, the GVGV-Cou gel is still able to be used as a soft material for dye encapsulation. Two dyes, Congo Red (CR) and Methylene Blue (MB), were used to probe the dye release and the impact of the type of molecule on this process.…”

“…It has been reported that CT interactions are an important noncovalent interaction, which can drive the formation of gels. 11 Normally, donor and acceptor molecules are both needed and two-component CT gels have been obtained. 12 CT gels formed from a single building block are rare.…”

Multifarious facets of sugar-derived molecular gels: molecular features, mechanisms of self-assembly and emerging applications

“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21]23,24,30,32,[35][36][37]42,43,[45][46][47][48][49][50][51][52][55][56][57][58][60][61][62][63][64][65][66][68][69][70][71][72][73][74][75] However, there is no review that addresses the interesting topic of sugar-derived gels. There are several review articles in the contemporary literature on various aspects of gels.…”