Abstract:Photoinitiators are critical to initiate chain reactions in photopolymerization. For such applications, the absorption of photoinitiator must be compatible with the emission of light sources and enables the fast manufacturing of threedimensional network or structures. Light-emitting diode (LED) is a new kind of energy-saving and environmental protection light source, exhibiting a substantial response in the near UV and visible range to replace the traditional mercury lamp and other light sources in photopolyme… Show more
“…[262] Choice of bicarbazole as the chromophore was supported by previous works of the same groups on another family of type I photoinitiators, namely bicarbazole-based oxalates. [263] Noticeably, by using a bicarbazole structure, a slight redshift of the absorption maxima was found for all oxime esters compared to the parent OXE-02 (See Figure 9 and Table 2). Even if only a minor variation of the absorption maxima was found between the different compounds, absorption spectra extending until 400 nm for BC-OXE-1-BC-OXE-3, 450 nm for BC-OXE-4 and BC-OXE-5 could be determined.…”
“…[262] Choice of bicarbazole as the chromophore was supported by previous works of the same groups on another family of type I photoinitiators, namely bicarbazole-based oxalates. [263] Noticeably, by using a bicarbazole structure, a slight redshift of the absorption maxima was found for all oxime esters compared to the parent OXE-02 (See Figure 9 and Table 2). Even if only a minor variation of the absorption maxima was found between the different compounds, absorption spectra extending until 400 nm for BC-OXE-1-BC-OXE-3, 450 nm for BC-OXE-4 and BC-OXE-5 could be determined.…”
“…A common method for red-shifting absorption is to modify structures through molecular engineering approaches, such as introducing chromophores and large conjugated structures, including carbazole, [25][26][27][28] stilbene, [29][30][31] pyrazoline, 32,33 and coumarin. [34][35][36][37] However, these visible LED PIs have limited applications.…”
In this work, three dyes based on fused carbazole–coumarin–ketone structures were designed and synthesized. These dyes were named CCK–Me, CCK–Ph, and CCK–Tol in accordance with their different substituents. Their excellent...
“…Similarly, bis-carbazoles, with two carbazole units linked through the 3-3 0 positions, with high Stokes shift belong to a class of molecules with numerous applications in organic electronics, sensors, and photovoltaics due to their low ionization potential, high thermal stabilities, as well as their blue luminescence. [24][25][26][27][28][29][30] Bis-carbazole scaffolds have also been utilized as potential host materials for phosphorescent OLEDs. The rationale behind this work relies on the exploration of the twisted architecture of Tro ¨ger's base as well as the intrinsic fluorescence properties of bis-carbazole scaffolds to design novel luminescent organic molecules.…”
This work describes the design and synthesis of three new Tröger’s base appended bis-carbazole units via the oxidative coupling method aiming to achieve solid-state luminescent materials. We envisaged that the...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.