1206833-01-3

Upstream product

• 1206832-99-6 4-[5'-(5,5-dimethyl-1,3-dioxan-2-yl)[2,2'-bithiophen]-5-yl]benzenamine 
• 1515-88-4 1-bromo-4-methoxymethylbenzene 
• 110046-60-1 5'-bromo-2,2'-bithiophene-5-carboxaldehyde 
• 4805-22-5 5,5'-dibromo-2,2'-bisthiophene 
• 1372699-62-1 2-(5'-bromo-2,2'-bithiophen-5-yl)-5,5-dimethyl-1,3-dioxane 

Downstream Products

• 1206833-05-7 5'-{4-[bis-(4-methoxymethyl-phenyl)-amino]-phenyl}-[2,2']bithiophene-5-carboxaldehyde 

Relevant academic research and scientific papers

Hydrophilicity control of visible-light hydrogen evolution and dynamics of the charge-separated state in dye/TiO2/Pt hybrid systems

Visible-light-driven H2 evolution based on Dye/TiO 2/Pt hybrid photocatalysts was investigated for a series of (E)-3-(5'-{4-[bis(4-R1-phenyl)amino]phenyl}-4,4'-(R2) 2-2,2'-bithiophen-5-yl)-2-cyanoacrylic acid dyes. Efficiencies of hydrogen evolution from aqueous suspensions in the presence of ethylenediaminetetraacetic acid as electron donor under illumination at λ>420 nm were found to considerably depend on the hydrophilic character of R1, varying in the order MOD (R1=CH 3OCH2, R2=H)≈MO4D (R1=R 2=CH3OCH2)>HD (R1=R 2=H)>PD (R1=C3H7, R 2=H). In the case of MOD/TiO2/Pt, the apparent quantum yield for photocatalyzed H2 generation at 436 nm was 0.27A±0.03. Transient absorption measurements for MOD- or PD-grafted transparent films of TiO2 nanoparticles dipped into water at pH 3 commonly revealed ultrafast formation (.+) followed by multicomponent decays, which involve minor fast decays (1 and major slower decays with significant differences between the two samples: 1) the early decay of the major components for MOD is about 2.5 times slower than that for PD and 2) a redshift of the spectrum occurred for MOD with a time constant of 17 ps, but not for PD. The substituent effects on H2 generation as well as on transient behavior have been discussed in terms substituent-dependent charge recombination (CR) of Dye.+ with electrons in bulk, inner-trap, and/or interstitial-trap states, arising from different solvent reorganization. Photosensitized H2 generation by a series of Dye/TiO2/Pt hybrids revealed clear dependence on the hydrophilic/hydrophobic character of the substituent R of Dye (see figure; I(H2)=apparent quantum yield for H2 generation.), which was shown by femtosecond transient spectroscopy to arise from the hydrophilic control of charge recombination (CR) between Dye.+ and the injected electron TiO2(e -). Copyright

Significance of hydrophilic characters of organic dyes in visible-light hydrogen generation based on TiO2

[Chemical equaction presented] A series of dyes were synthesized to examine the roles of the hydrophilic characteristics of R in sensitized hydrogen generation by dyegrafted Pt/TiO2 under visible light irradiation. The hydrogen-generation efficiencies and optimum amounts of the dyes grafted to Pt/TiO2 were affected substantially by the hydrophilic and steric effects of R; moderately hydrophilic DE01 and DE02 showed higher sensitization activity at a lower loading than hydrophobic D-H.