Quenching Mechanism of Rose Bengal Triplet State Involved in Photosensitization of Oxygen in Ethylene Glycol

2006 ◽  
Vol 110 (5) ◽  
pp. 1735-1739 ◽  
Author(s):  
Okiyasu Shimizu ◽  
Jun Watanabe ◽  
Shizuo Naito ◽  
Yasushi Shibata
Keyword(s):  
Ethylene Glycol ◽  
Triplet State ◽  
Rose Bengal ◽  
Quenching Mechanism

High-Pressure Study on the Quenching Mechanism by Oxygen of the Lowest Triplet State in Solution

1998 ◽  
Vol 102 (52) ◽  
pp. 10703-10709 ◽  
Author(s):  
Masami Okamoto ◽  
Fujio Tanaka ◽  
Satoshi Hirayama
Keyword(s):  
High Pressure ◽  
Triplet State ◽  
Quenching Mechanism ◽  
High Pressure Study

A new quenching mechanism of the (.pi..pi.*) ketone triplet state

1970 ◽  
Vol 92 (20) ◽  
pp. 6086-6088 ◽  
Author(s):  
Arthur G. Schultz ◽  
Charles D. DeBoer ◽  
William G. Herkstroeter ◽  
Richard H. Schlessinger
Keyword(s):  
Triplet State ◽  
Quenching Mechanism

scholarly journals Kinetics of Enhancement for Corneal Cross-linking: Proposed Model for a Two-initiator System

2019 ◽  
pp. 1-6 ◽  
Author(s):  
Jui-Teng Lin
Keyword(s):  
Triplet State ◽  
Rose Bengal ◽  
Singlet State ◽  
Kinetic Equations ◽  
Green Light ◽  
Rate Equations ◽  
Cross Linking ◽  
Type Ii ◽  
Initiator System ◽  
Kinetics Of

Aims: To derive kinetic equations and analytic formulas for efficacy enhancement of corneal collagen crosslinking (CXL) in a 2-initiator system. Study Design:  Modeling the kinetics of CXL. Place and Duration of Study: Taipei, Taiwan, between between January 2019 to June, 2019. Methodology: Coupled rate equations are derived for two initiators system for a type-II process, consisting of a primary initiator (PA), and a co-initiator (PB) as an enhancer, having 3 cross linking pathways: Two radical-mediated (or electron transfer) pathways, and one oxygen-mediated (or energy transfer) pathway. For a type-II process, the triplet state T* interacts with the co-initiator, PB, to form the primary radicals R’, and an active intermediates radical, R, which could interact with the substrate [M] for crosslink, or be inhibited by oxygen [O2], or bimolecular termination. Rate equations, based on lifetime of triplet-state and oxygen singlet-state, are used to analyze the measured results in a rose-Bengal system with an enhanced initiator. Results: Additive enhancer-monomer of arginine added to a rose Bengal photosensitizer may enhance the production of free radicals under a green-light CXL. D2O may extends the lifetime of oxygen singlet state and thus improve the efficacy. Our formulas predicted features are consistent with the measured results. Conclusion: Efficacy may be improved by enhancer-monomer or extended lifetime of photosensitizer triplet-state or oxygen singlet state.

Sign in / Sign up

Export Citation Format

Share Document