5170-67-2Relevant academic research and scientific papers
Design and development of dithienopyrrolobenzothiadiazole (DTPBT)-based rigid conjugated polymers with improved hole mobilities
Bhanvadia, Viraj J.,Machhi, Hiren K.,Soni, Saurabh S.,Zade, Sanjio S.,Patel, Arun L.
, (2020/10/12)
Donor-acceptor integrated ladder-type dithienopyrrolobenzothiadiazole (DTPBT)-based conjugated building blocks have been used to develop rigid conjugated polymers by copolymerizing them with synthesized ladder-type indoloquinoxaline, π-extended isoindigo and π-extended 2,1,3-benzothiadiazole-based conjugated building blocks. Structural aspects of synthesized building blocks are studied by single-crystal X-ray diffraction, which revealed the co-planar structure of indoloquinoxaline-scaffold while twisted but intramolecularly hydrogen-bonded structures of π-extended isoindigo- and 2,1,3-benzothiadiazole-scaffolds with number of intermolecular non-bonding interactions. The synthesized DTPBT-based conjugated polymers P-1, P-2 and P-3 are studied for photophysical and electrochemical properties and are found to have moderate to good visible light absorptivity with HOMO energy levels below ?5.0 eV. The X-ray diffraction studies indicate strong π?π stacking interactions induced face-on arrangement of polymer chains respective to the substrate. Polymers show π?π stacks promoted high space-charge limited current (SCLC) hole mobilities ranging between 5.6 × 10?4 –1.3 × 10?3 cm2V?1s?1. The obtained SCLC hole mobility data in tandem with the studied structural aspects of monomers and morphological aspects of polymers, suggest that the combination of ladder-type DTPBT-scaffolds (capable of intermolecular π?π interactions) with non-ladder-type planar and structurally rigid π-extended conjugated scaffolds (capable of intermolecular π?π and other non-bonding interactions) is beneficial for getting good hole mobilities.
Benzothiadiazole functionalized D-A type covalent organic frameworks for effective photocatalytic reduction of aqueous chromium(vi)
Chen, Weiben,Yang, Zongfan,Xie, Zhen,Li, Yusen,Yu, Xiang,Lu, Fanli,Chen, Long
, p. 998 - 1004 (2019/01/24)
Covalent organic frameworks (COFs) have received increasing research interest as an emerging class of crystalline and porous polymers. Herein, we prepared two new benzothiadiazole (BT) functionalized COFs (i.e. TPB-BT-COF and TAPT-BT-COF), which exhibit g
Facile synthesis of benzothiadiazole-based chromophores for enhanced performance of second-order nonlinear optical materials
Li, Ming,Zhang, Hui,Zhang, Yan,Hou, Baoshan,Li, Chuangyang,Wang, Xibin,Zhang, Ji,Xiao, Linghan,Cui, Zhanchen,Ao, Yuhui
, p. 9094 - 9102 (2016/10/09)
Novel benzothiadiazole-based second-order nonlinear optical (NLO) chromophores with different push-pull structures were developed. Incorporation of benzothiadiazole (BTD) as a bridge for improving the electro-optic (EO) coefficient (r33) of bulky materials has not been well investigated, despite its extensive application in other photonic materials as electron acceptor. NMR and MS have been used to characterize the structure of synthesized chromophores 5-7. Optical properties have been investigated by UV-vis spectra. Density functional theory calculations have been used to calculate the first-order hyperpolarizability (β) of chromophores r1, 5a, 7a and 5b. Moreover, the poling results of guest-host EO polymers, 5a/PC and 5b/PC, afforded good r33 values of 67 pm V-1 and 45 pm V-1, respectively. All the results demonstrated an improvement in both micro- and macroscopic nonlinearity after incorporation of BTD into chromophores.
A novel donor-Acceptor-Acceptor-Acceptor polymer containing benzodithiophene and Benzimidazole-Benzothiadiazole-Benzimidazole for PSCs
Tamilavan, Vellaiappillai,Song, Myungkwan,Agneeswari, Rajalingam,Kim, Sangjun,Hyun, Myung Ho
, p. 1098 - 1104 (2014/05/06)
New electron deficient acceptor-acceptor-acceptor type of monomer unit composed of weak electron accepting benzimidazole and relatively strong electron accepting benzothiadiazole derivatives namely 4,7-bis(6-bromo- 1-(2-ethylhexyl)-1H-benzo[d]imidazol-2-yl)benzo[c][1,2,5]thiadiazole (BBB) was synthesized. The Stille polycondensation of the newly synthesized BBB monomer with electron donating 2,6-bis(trimethyltin)-4,8- bis(2-ethylhexyloxy)benzo[1,2-b:4,5-b']dithiophene (BDT) afforded donor-acceptor-acceptor-acceptor type of polymer namely 2,6-(4,8-bis(2-ethylhexyloxy)benzo[1,2-b:4,5-b']dithiophene)-alt-4,7-bis(1-(2-ethylhexyl)- 1H-benzo[d]imidazol-2-yl)benzo[c][1,2,5]thiadiazole (PBDTBBB). The opto-electrical studies revealed thatthe absorption band of PBDTBBB appeared in the range of 300 nm-525 nm and its highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels were positioned at -5.18 eV and -2.84 eV, respectively. The power conversion efficiency (PCE) of the polymer solar cell (PSC) prepared from PBDTBBB:PC71BM (1:2 wt %) blend was 1.90%.
