Fine-tuning the optoelectronic chattels of fluoreno-thiophene centred molecular semiconductors through symmetric and asymmetric push–pull switch

Abstract

Optoelectronic properties of symmetrical and unsymmetrical fluoreno-thienyl π-semiconductors were studied.

Supercritical water assisted preparation of recyclable gold nanoparticles and their catalytic utility in cross-coupling reactions under sustainable conditions

“…As an application of AuNP catalysis coupled with our pursuance on photoactive functional chromophores, [28][29][30] we envisaged the synthesis of optoelectronic p-semiconductors by taking advantage of our sustainable conditions (Scheme 3). In this connection, 3g, 91,92 an important thiophene oligomer intermediate frequently encountered in dye-sensitized solar cells (DSSCs) has been prepared by the Suzuki reaction between 1d and 2f, albeit in low yield (28%).…”

“…[19][20][21][22][23][24] On the other hand, it is pertinent to mention that the catalytic potential of AuNPs is exemplied in oxidative esterication and hydrogen transfer reactions. 25 As part of our research interest in new reaction development [26][27][28][29][30] based on gold catalysis, [31][32][33][34][35][36][37] we became interested in the sustainable preparation of AuNPs and subsequent catalytic application in cross-coupling reactions. In particular, we desired to develop a simple and practical procedure for AuNP catalyzed Sonogashira and Suzuki reactions.…”

Cycloisomerization of π‐Coupled Heteroatom Nucleophiles by Gold Catalysis: En Route to Regiochemically Defined Heterocycles

“…To this end, the present review sum up the regioselective heterocyclization by activation of π‐functionality tethered nucleophiles under the catalytic action of gold. With my journey on various aspects of heterocyclics ranging from methodology [106–112] to medicinal chemistry [113–125] and sustainable energy, [126–133] the present review is particularly intended to cover only heterocyclization. Depending on the substrate class based on the nature of heteroatom and π‐residue, this review is categorized into various sub‐sections with ample illustrations.…”

Catalytic Synthesis of Luminescent Pyrimidines via Acceptor-less Dehydrogenative Coupling

“…6 Such push-pull molecules are also sought as low band-gap materials for applications including light emitting diodes (LEDs), 7 photovoltaic devices [8][9][10] and organic electronics. 11 As with emissive molecule design in general, there has been expanded interest of late in straightforward and more sustainable preparatory routes to highly substituted, emissive pyrimidines. Moving away from metal-catalyzed cross-coupling methodologies for the derivatization of halogenated pyrimidines, [12][13][14][15][16][17][18][19] for example, would obviate the production of halogenated waste.…”