New fluorescent switches based on photochromic 2,3-diarylcyclopent-2-en-1-ones and 6-ethoxy-3-methyl-1H-phenalen-1-one

Preparation and photochromic properties of layer-by-layer self-assembly films and light-responsive micelles based on amphiphilic naphthopyran derivative

“…Photochromic compounds, such as diarylethenes, spiropyrans, spirooxazines, azobenzenes, naphthopyrans have attracted considerable research attention [4][5][6] because they display a reversible molecular structure transformation, which results in a reversible change from colorless to colored states upon alternative irradiation of ultraviolet (UV) light and visible light. Among naphthopyrans (NP) are one type of important photochromic compounds with special properties, such as the absence of background color and good thermal reversibility, etc [7].…”

Fatigue Determination of Photochromic Dyes in Silica and Polyamide Matrices via Analysis of CIELAB Parameters

“…Photochromic materials are most commonly used for ophthalmic lenses, security printing, optical recording 2 and switching, solar energy deposition, and biological systems. [3][4][5][6][7][8][9][10][11][12][13][14][15][16] Photochromic organic counterparts used in textile technologies include disperse dyes, which have a certain a nity towards man-made, arti cial bers such as polyamide (PA), polyacrylonitrile (PAC), and polyester (PES). 17,18 Additionally, a large number of matrices (carriers), which can be used to contain photochromic materials, have varied free surface areas that provide the space needed for chemical bond breakage.…”

Kinetics and mechanism of photochromic transformations of a 2,3-diarylcyclopentenone

“…Recently a new class of photochromic diarylethenes, 2,3 diarylcyclopent 2 en 1 ones (DCPs) was pro posed [11][12][13][14][15][16][17][18][19], which is free of the mentioned disad vantage. In comparison with other diarylethenes, the DCPs have unique abilities to the chemical modifica tion of the cyclopentenone ring.…”

“…In [17], a family of new DCPs was synthesized and their spectral and kinetic characteristics were studied. In [18], these DCPs were used to develop new fluorescent switches. Unfortu 1 The article was translated by the authors.…”

“…In this work, laser flash photolysis was performed to study the primary photochemical processes for one of the DCPs described in [17,18], namely 2,3 bis(2,5 dimethylthiophen 3 yl cyclopent 2 en 1 one), here after designated 1A (Scheme; closed (photoinduced) form of this compound is marked as 1B). The goal of the work is to study the possible impact of the reactions of the 1A triplet state into the DCPs photodegradation.…”