scholarly journals Ring closure via thermal decarboxylation of 2-(4-methoxyphenyl)thio)benzoic acid to 2-​methoxy-9H-​thioxanthen-​9-​one

10.1039/sp847 ◽  
2018 ◽  
Author(s):  
Joshua Gettins ◽  
Mariyah Sajjad ◽  
Mark Wainwright ◽  
Robert Smith

Author(s):  
W. E. Lee

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.



10.1039/sp516 ◽  
2011 ◽  
Author(s):  
Baris Kiskan
Keyword(s):  


Author(s):  
M. Dastych ◽  
Z. Jelinkova ◽  
A. Mikuskova ◽  
P. Brychta ◽  
M. Benovska




2019 ◽  
Author(s):  
K Georgousaki ◽  
N Tsafantakis ◽  
S Gumeni ◽  
V González-Menéndez ◽  
G Lambrinidis ◽  
...  


2020 ◽  
Vol 36 (3) ◽  
pp. 217-228
Author(s):  
KAZIM SHAMIM RIZVI ◽  
◽  
P. K. DUTTA ◽  
Keyword(s):  




2020 ◽  
Vol 57 (2) ◽  
pp. 115-121 ◽  
Author(s):  
Sangita Mandal ◽  
Satyajit Biswas ◽  
Monohar Hossain Mondal ◽  
Bidyut Saha


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