TY  - JOUR
T1  - Synthesis, Crystal Structure, Optical Properties and the Theoretical Study of aPhoto-Switchable 8-(<i>p</i>-tolyl)-8<i>H</i>-Acenaphtho [1, 2-<i>d</i>] Imidazolyl Dimer
AU - M. Al-Dies, Al-Anood AU - M. Asiri, Abdullah AU - I. Osman, Osman AU - A. Khan, Salman 
JO  - Research Journal of Applied Sciences
VL  - 13
IS  - 10
SP  - 616
EP  - 625
PY  - 2018
DA  - 2001/08/19
SN  - 1815-932x
DO  - rjasci.2018.616.625
UR  - https://makhillpublications.co/view-article.php?doi=rjasci.2018.616.625
KW  - Photodissociation
KW  -thermal recombination
KW  -kinetics
KW  -fluorescence switching
KW  -X-ray
KW  -DFT
AB  - The X-ray structure analysis show that the radical dimerization of 8-(<i>p</i>-tolyl)-8<i>H</i>-acenaphtho [1, 2-<i>d</i>] imidazole leads to 1, 2&#39;-isomer structure. The estimated geometrical parameters are in excellent agreement with the experimental crystal structural peers. 8-(<i>p</i>-tolyl)-8<i>H</i>-acenaphtho [1, 2-<i>d</i>] imidazolyl dimer (TAID) exhibited excellent photochromism. The colored species of TAID are stable in solutions with good fatigue resistance. Its kinetic studies show that the photocoloration obey first order kinetics and the thermal bleaching processes obey second order. The photochromic dye shows decrease of fluorescence intensity with the photochromic reaction, due to the formation of nonemissive photoproduct and with the thermal recombination reaction in the dark the fluorescence intensity recovers.
ER  -