A fluorescent and halochromic indolizine switch

2016 ◽  
Vol 4 (14) ◽  
pp. 2744-2747 ◽  
Author(s):  
Yang Zhang ◽  
Jaume Garcia-Amorós ◽  
Burjor Captain ◽  
Françisco M. Raymo
Keyword(s):  
Proton Transfer ◽  
Polymer Film ◽  
Molecular Switch ◽  
Photoacid Generator

Proton transfer from a photoacid generator to a halochromic molecular switch within a polymer film permits the imprinting of fluorescent patterns under the influence of optical stimulations.

Excited state intramolecular proton transfer dynamics of semi-rigid polyquinoline in solution and polymer film

2008 ◽  
Vol 450 (4-6) ◽  
pp. 302-307 ◽  
Author(s):  
Chul Hoon Kim ◽  
Dong Wook Chang ◽  
Sehoon Kim ◽  
Soo Young Park ◽  
Taiha Joo
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Polymer Film ◽  
Intramolecular Proton Transfer

Photoresponsive Molecular Switch for Regulating Transmembrane Proton-Transfer Kinetics

2015 ◽  
Vol 137 (44) ◽  
pp. 14059-14062 ◽  
Author(s):  
Ying Li ◽  
Edmund C. M. Tse ◽  
Christopher J. Barile ◽  
Andrew A. Gewirth ◽  
Steven C. Zimmerman
Keyword(s):  
Proton Transfer ◽  
Molecular Switch

A Study on the Photolysis Behavior of Photoacid Generators

2011 ◽  
Vol 284-286 ◽  
pp. 2073-2076
Author(s):  
Wei Min Zhang ◽  
Wen Guang Wang ◽  
Jia Ling Pu
Keyword(s):  
Polymer Film ◽  
Rhodamine B ◽  
Photochemical Reaction ◽  
High Polymer ◽  
Sulfonium Salts ◽  
Precise Data ◽  
Photoacid Generators ◽  
Different Types ◽  
Photoacid Generator

A method for evaluating the photolysis behavior of photoacid generator in solvent and high polymer film has been established through spectrophotometry and fluorospectrophotometry by using the acid-sensitive Rhodamine B as tracer. Results showed that this method is feasible and practicable for evaluating the acid generating efficiency of photoacid generator in organic solvents or polymer film, yielding quantitatively precise data of the photochemical reaction and acid generating behavior, thus is very useful for evaluating the quality of different types of photacid generators e.g. triazines, sulfonium salts etc.

Electric field control of proton-transfer molecular switching: molecular dynamics study on salicylidene aniline

2015 ◽  
Vol 17 (22) ◽  
pp. 14484-14488 ◽  
Author(s):  
Joanna Jankowska ◽  
Joanna Sadlej ◽  
Andrzej L. Sobolewski
Keyword(s):  
Molecular Dynamics ◽  
Electric Field ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Molecular Switch ◽  
Molecular Switching ◽  
Switching Mechanism ◽  
Field Control

In this letter, we propose a novel, ultrafast, efficient molecular switch whose switching mechanism involves the electric field-driven intramolecular proton transfer.

Use of fluorescent probes to determine catalytic chain length in chemically amplified resists

2005 ◽  
Vol 83 (6-7) ◽  
pp. 869-874 ◽  
Author(s):  
Mathieu Frenette ◽  
Marius Gabriel Ivan ◽  
J C Scaiano
Keyword(s):  
Polymer Film ◽  
Chain Length ◽  
Emission Spectra ◽  
Chemically Amplified ◽  
Post Exposure Bake ◽  
Novel Method ◽  
Acid Catalyzed ◽  
Chemically Amplified Resists ◽  
Coumarin 6 ◽  
Photoacid Generator

Acid-catalyzed deprotection of tert-butoxycarbonyl (t-Boc) pendant groups present in a polymer film is one of the most common chemical reactions in photolithography. We present here a novel method to determine the catalytic chain length of this reaction under different development conditions. We demonstrate this in model PMMA thin films containing triphenylsulphonium triflate as a photoacid generator, acid sensor coumarin 6, t-Boc protected coumarin 4, and base 2-piperidin-1-yl-ethanol (2-PE). Deprotection of the t-Boc group, catalyzed by the photogenerated acid, during the post-exposure bake leads to formation of coumarin 4, a strongly fluorescent molecule whose concentration is monitored using fluorescence. We take advantage of the change in the emission spectra of coumarin 6 upon protonation to monitor acid formation. To quantify the amount of acid, an acid–base titration is done in the polymer film using 2-PE. Knowing the amount of deprotected probe and the amount of acid, we are able to calculate the number of moles of deprotected C4-t-Boc per mol of acid, which is the actual catalytic chain length.Key words: photolithography, chemical amplification, catalytic chain length, fluorescent sensors, photoacid generator.

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