Synthesis and optical properties of poly(tetramethylsilarylenesiloxane) derivative bearing diphenylcyclopentadithiophene moiety

Synthesis and Photovoltaic Properties of the Novel Dye of Branched Chain Polymeric Metal Complexes with Cyclopentadithiophene Derivatives as a Donor

“…Compared with ligands C1 and C2, the maximum absorption peaks of P1, P2, P3, and P4 were at 470, 460, 406, and 394 nm; they are shifted toward the longer wavelength region with strong and wider absorption bands, which was resulted from intramolecular charge transfer between the electron‐acceptor unit and the electron‐donor unit. And P1( λ max = 470 nm) and P2( λ max = 460 nm) show a large redshift when compared with the UV–visible spectrum of the monomer donor ( λ max = 351 nm) . We can also see that the maximum absorption peaks of polymeric metal complexes P1 and P2 are redshifted by about 65 nm than that of P3 and P4, which might be due to the fact that the ability of donating electron of alkylthiophene is better than alkylbenzene and π–π* translation can take place easily.…”

“…And P1(λ max = 470 nm) and P2(λ max = 460 nm) show a large redshift when compared with the UV-visible spectrum of the monomer donor (λ max = 351 nm). 33 We can also see that the maximum absorption peaks of polymeric metal complexes P1 and P2 are redshifted by about 65 nm than that of P3 and P4, which might be due to the fact that the ability of donating electron of alkylthiophene is better than alkylbenzene and π -π * translation can take place easily. The maximum absorption peaks of polymeric metal complex with Co (P1 and P3) are redshifted by about 10 nm than corresponding polymeric metal complex with Zn (P3 and P4), and the effect of redshift is less pronounced; it might be due to the fact that the radius of Co(II) is larger than that of Zn(II) even though Co(II) has more electrons than Zn(II) ion.…”

Robust Nonspiro‐Based Hole Conductors for High‐Efficiency Perovskite Solar Cells

“…The central brominated CPDT 1 was synthesized in three steps starting from benzophenone following a literature procedure. [ 14 ] The TPA boronic ester 2 was prepared by palladium‐catalyzed direct borylation of 4‐bromotriphenylamine in 87% isolated yield. Related para‐methoxy‐capped TPA boronic ester 3 was synthesized in three steps following literature procedures and the targeted HTMs by twofold palladium‐catalyzed Suzuki‐type crosscoupling reaction of dibromide 1 and TPA boronic esters 2 – 3 in good yields (75–78%) after purification.…”

Thermal and Optical Properties of Dibenzothiophene-Based Poly(tetramethylsilarylenesiloxane) Derivatives

“…[4] 1,1,3,3-Tetramethylguanidinium 2-ethylhexanoate was obtained from the equimolar mixture of 1,1,3,3-tetramethylguanidine and 2-ethylhexanoic acid (Tokyo Chemical Industry Co., Ltd). [10][11][12][13][14][15] 2.2. Measurements 1 H and 13 C NMR spectra were recorded on a JEOL ECX-400 spectrometer in deuterated dimethyl sulfoxide (DMSO-d6) or chloroform (CDCl3) at ambient temperature.…”

“…[6][7][8][9] Our research group has also reported that poly(tetramethylsilarylenesiloxane) derivatives where the aromatic moiety is introduced into the main chain component of polysiloxane improve the heat resistance and fluorescence quantum yield. [10][11][12][13][14][15] Based on the above background, we synthesized dibenzothiophene derivatives with trimethylsilyl groups as well as poly(tetramethylsilarylenesiloxane) derivatives bearing dibenzothiophene moiety as shown in Scheme 1 in this research. In addition, oxidized compounds of the above-mentioned derivatives were also prepared.…”