Intrinsically thermochromic fluorans

Abstract

A Suzuki coupling strategy has been employed to access a series of novel fluorans substituted with a phenolic moiety. These fluorans display good thermochromism in methyl stearate and obviate the need for traditional complex formulations containing acidic colour developers.

Raspberry‐Shaped Thermochromic Energy Storage Nanocapsule with Tunable Sunlight Absorption Based on Color Change for Temperature Regulation

“…The results prove that the reflection of RTESN is increased after heating, which is consistent with the results in the refs. . In order to investigate the effect of color on the light absorption and reflectance, RTESN with blue, red, and black colors were shown and tested (Figure b and Figures S7b, S10, and S11, Supporting Information).…”

One‐pot Syntheses of Some New 2,4(1H,3H)‐quinazolinedione Derivatives in the Absence of Catalyst

“…We have concentrated most of our recent studies on the preparation of bioactive nitrogen-containing heterocycles, and have already described simple, efficient procedures, and multi-component reaction (MCR) for preparation of 2,4(1H,3H)-quinazolinediones [25], 2,3-dihydroquinazolin-4(3H)-one [26,27], 1′H-spiro[isoindoline-1,2′-quinazoline]-3,4′(3′H)-dione [28], indolo[2,1-b]quinazolin-12-ones [29], bis[spiro(quinazoline-oxindole)] [30] and spirooxindole [31].…”

Reductive alkylation of aminofluorans: A simple route to intrinsically thermochromic fluorans

“…We have recently reported the use of Pd-mediated amination [4] and Pd-mediated hydroxyarylation [5] for the functionalization of a series of bromo(benzo)fluorans. The latter account described the synthesis of a series of hydroxyaryl benzofluorans which exhibited thermochromism without the need of the established colour developer bisphenol A when formulated in methyl stearate.…”