Effect of alkyl chains on luminescence properties with 3-hydroxy-2-naphthoate esters

Tang, Gui-Mei; Xi, Yu-Rong; Liu, Li; Chen, Xiaomin; Lu, Qi-Shu; Xue, Yun-Kai; Yang, Hui; Wang, Yong-Tao

doi:10.1016/j.molstruc.2022.133220

Cited by 13 publications

(2 citation statements)

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“…In addition, all the Peko series oxime esters exhibited higher molar extinction coefficient than did the TP-1M (methyl substation) due to the relative longer alkyl chain length. [38] Furthermore, the OXE-01 was also conducted for comparison (Figure 3a). Clearly, all the new oxime esters exhibited rather red-shifted absorption regions because of the presence of electron donating TPA group in their structures.…”

Section: Optical Properties and Thermal Propertiesmentioning

confidence: 99%

“…[25] However, the effect of the alky chains for photoreactivity from the literatures are usually dominated by methyl groups. [21,25] Tang et al reported he introduction of various alkyl chains could increase the ability of light absorption; [38] thus, this feature might contribute to the increase of photoreactivity. As part of our continued efforts to develop triphemylamine oxime esters with high photoreactivity and better visible-light absorbing region, in this study, we report the synthesis and characterization of novel TPA oxime ester based on various alkyl chain lengths in the periphery of the compounds (Peko-A~D, Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Terminal Alkyl Chains for Free Radical Photopolymerization Based on Triphenylamine Oxime Ester Visible‐Light Absorbing Type I Photoinitiators

et al. 2023

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In order to investigate the photopolymerization properties of the alkyl chain length dependence Type I photoinitiators, in this study, a series of visible‐light‐absorbing triphenylamine oxime esters (Peko‐A‐D, and reference TP‐1M) containing various alkyl chain length in the periphery were synthesized. That is, an alkane segment contains isopropyl for Peko‐A, butyl for Peko‐B, undecane for Peko‐C, pentadecane for Peko‐D and methyl for TP‐1M, respectively. Except for Peko‐D, all of them have good organo‐solubility and can dissolve in testing monomer (trimethylolpropane triacrylate, TMPTA). All the oxime esters give from near UV to visible‐light absorption regions with maximum absorption peaks at around 360 nm and show rather red‐shifted compared to the commercial OXE‐01 compound. Accordingly, the photochemical reaction behavior was studied by cyclic voltammograms (CV), electron spin resonance (ESR) and steady‐state photolysis. In addition, the oxime esters based photoinitiating systems are studied through photo‐DSC experiment based on various light exposure wavelengths (UV lamp, LED@365 nm and LED@405 nm). Under different light source, the penetration affects the final double conversion efficiencies. As a result, all the oxime esters‐based formulation shows better double conversion efficiencies upon LED@405 nm as an irradiation source. Finally, the new oxime ester photoinitiating system was capable applied in direct laser write to generate 3D patterns using a laser diode @405 nm.

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Section: Optical Properties and Thermal Propertiesmentioning

confidence: 99%