The photophysical behavior of the photochromic naphthopyran derivative having photo-switching ability
摘要:
The photophysical behavior of the photochromic naphthopyran derivative 9 with photo-switching ability has been investigated in solution phase as well as in crystalline form. The proposed switching motifs might be a versatile framework in the development of photonic devices whose properties can be toggled between two states on exposure to electromagnetic radiations. The closed form of 9 undergoes reversible transformation upon irradiation with light by changing the molecular structure from ring closed conformation 9 to the ring opened form 10. The compound 9 exhibited first absorption signal at 238 nm with shoulder peak at 261 nm and second absorption signal at 353 nm while on photo-irradiation, the colorless solution of 9 turn to colored and there was ratiometric downfall in the signal intensity for shoulder signal at 261 nm as well as second absorption signal at 353 nm and ultimately results in the disappearance of these both signal after 20 min of irradiations. Meanwhile, the colorimetric change in the reaction solution and considerable shift in the absorption and emission signal intensity as well as position suggest the conformational changes in the molecules from less conjugate conformation 9 to the extended conjugated conformation 10. (C) 2014 Elsevier B.V. All rights reserved.
The photophysical behavior of the photochromic naphthopyran derivative having photo-switching ability
摘要:
The photophysical behavior of the photochromic naphthopyran derivative 9 with photo-switching ability has been investigated in solution phase as well as in crystalline form. The proposed switching motifs might be a versatile framework in the development of photonic devices whose properties can be toggled between two states on exposure to electromagnetic radiations. The closed form of 9 undergoes reversible transformation upon irradiation with light by changing the molecular structure from ring closed conformation 9 to the ring opened form 10. The compound 9 exhibited first absorption signal at 238 nm with shoulder peak at 261 nm and second absorption signal at 353 nm while on photo-irradiation, the colorless solution of 9 turn to colored and there was ratiometric downfall in the signal intensity for shoulder signal at 261 nm as well as second absorption signal at 353 nm and ultimately results in the disappearance of these both signal after 20 min of irradiations. Meanwhile, the colorimetric change in the reaction solution and considerable shift in the absorption and emission signal intensity as well as position suggest the conformational changes in the molecules from less conjugate conformation 9 to the extended conjugated conformation 10. (C) 2014 Elsevier B.V. All rights reserved.
Photochromic Polymer and Composition Comprising Photochromic Polymer
申请人:Evans Richard Alexander
公开号:US20110147681A1
公开(公告)日:2011-06-23
A photochromic polymer comprising at least one siloxane oligomer and at least two photochromic groups covalently linked to one or both terminuses of the siloxane oligomer and compositions containing photochromic siloxane polymers with narrow polydispersity. The photochromic polymer enhances switching speed in rigid host polymers.
Fluorescent dye compounds, conjugates and uses thereof
申请人:Life Technologies Corporation
公开号:EP2371927A1
公开(公告)日:2011-10-05
The present teachings generally relate to fluorescent dyes, linkable forms of fluorescent dyes, energy transfer dyes, reagents labeled with fluorescent dyes and uses thereof.
本教导一般涉及荧光染料、荧光染料的可连接形式、能量转移染料、用荧光染料标记的试剂及其用途。
PHOTOCHROMIC POLYMER AND COMPOSITION COMPRISING PHOTOCHROMIC POLYMER
申请人:Advanced Polymerik Pty Ltd
公开号:EP2294114A1
公开(公告)日:2011-03-16
Fluorescent Dye Compounds, Conjugates and Uses Thereof
申请人:Graham Ronald J.
公开号:US20090093062A1
公开(公告)日:2009-04-09
The present teachings generally relate to fluorescent dyes, linkable forms of fluorescent dyes, energy transfer dyes, reagents labeled with fluorescent dyes and uses thereof.