HeI photoelectron spectrum of B(OCH3)3 is presented in this paper. The assignment of the spectrum has been also done by an analysis of the intensity of the spectrum bands and the optimized MNDO molecular orbital calcu...HeI photoelectron spectrum of B(OCH3)3 is presented in this paper. The assignment of the spectrum has been also done by an analysis of the intensity of the spectrum bands and the optimized MNDO molecular orbital calculation on B(OCH3)3 molecule. The split showing a 1.08eV of the bands at the lowest two ionization potentials (IPs) was assigned to the Jahn-Teller split of the doubly degenerate oxygen lone-pair orbitals. And the splits showing 0.42eV and 0.38eV on the above-mentioned hands were considered as the result of spin-orbital interaction. Therefore the this PES study provides an exceedirlgly experimental example to testify the Jahn-Teller effect and the spin-orbital interaction splitting.展开更多
B-N coordination bond can be used to develop polymer electron acceptors for efficient all-polymer solar cells （all-PSCs）. Here, we report a new alternating conjugated polymer containing two building blocks based on ...B-N coordination bond can be used to develop polymer electron acceptors for efficient all-polymer solar cells （all-PSCs）. Here, we report a new alternating conjugated polymer containing two building blocks based on B-N unit. The polymer exhibits strong light absorption in the visible range, low-lying LUMO/HOMO energy levels and moderate electron mobility. The resulting all-PSC devices exhibit power conversion efficiencies of 1.50%-2.47%.展开更多
o-Carborane-containing poly（hydroxy ethers）（P1, P2 and P3） were synthesized via ＂advancement reaction＂ of o-carborane-containing bisphenol（4） and diglycidyl ether of bisphenols（DGEBA and 1）. FTIR and 1^H^-,...o-Carborane-containing poly（hydroxy ethers）（P1, P2 and P3） were synthesized via ＂advancement reaction＂ of o-carborane-containing bisphenol（4） and diglycidyl ether of bisphenols（DGEBA and 1）. FTIR and 1^H^-, 13^C^-, and 11^ B-NMR were utilized to characterize the obtained polymers. TGA test was conducted under nitrogen and air. It is found that the shielding effect of carborane moiety on its adjacent aromatic structures contributes to high initial decomposition temperatures, while oxygen in air has an adverse effect on the initial decomposition temperature. The oxygen can combine with polymer chain to form peroxide and hydroperoxide groups, which are more reactive during the degradation process. Besides, o-carborane-containing poly（hydroxy ethers） have high char yield at elevated temperatures. The boron atom combines with oxygen from the polymer structure or/and from air, thus to form a three-dimensional network linked with B―O―B and B―C bonds, and retain the polymer weight to a large extent.展开更多
文摘HeI photoelectron spectrum of B(OCH3)3 is presented in this paper. The assignment of the spectrum has been also done by an analysis of the intensity of the spectrum bands and the optimized MNDO molecular orbital calculation on B(OCH3)3 molecule. The split showing a 1.08eV of the bands at the lowest two ionization potentials (IPs) was assigned to the Jahn-Teller split of the doubly degenerate oxygen lone-pair orbitals. And the splits showing 0.42eV and 0.38eV on the above-mentioned hands were considered as the result of spin-orbital interaction. Therefore the this PES study provides an exceedirlgly experimental example to testify the Jahn-Teller effect and the spin-orbital interaction splitting.
基金financially supported by the 973 Program(No.2014CB643504)the National Natural Science Foundation of China(Nos.51373165,21574129 and 21404099)+1 种基金the“Thousand Talents Program”of China,the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB12010200)the State Key Laboratory of Supramolecular Structure and Materials in Jilin University(No.sklssm201608)
文摘B-N coordination bond can be used to develop polymer electron acceptors for efficient all-polymer solar cells （all-PSCs）. Here, we report a new alternating conjugated polymer containing two building blocks based on B-N unit. The polymer exhibits strong light absorption in the visible range, low-lying LUMO/HOMO energy levels and moderate electron mobility. The resulting all-PSC devices exhibit power conversion efficiencies of 1.50%-2.47%.
基金financially supported by National Key R&D Program of China(No.2016YFB0302105)
文摘o-Carborane-containing poly（hydroxy ethers）（P1, P2 and P3） were synthesized via ＂advancement reaction＂ of o-carborane-containing bisphenol（4） and diglycidyl ether of bisphenols（DGEBA and 1）. FTIR and 1^H^-, 13^C^-, and 11^ B-NMR were utilized to characterize the obtained polymers. TGA test was conducted under nitrogen and air. It is found that the shielding effect of carborane moiety on its adjacent aromatic structures contributes to high initial decomposition temperatures, while oxygen in air has an adverse effect on the initial decomposition temperature. The oxygen can combine with polymer chain to form peroxide and hydroperoxide groups, which are more reactive during the degradation process. Besides, o-carborane-containing poly（hydroxy ethers） have high char yield at elevated temperatures. The boron atom combines with oxygen from the polymer structure or/and from air, thus to form a three-dimensional network linked with B―O―B and B―C bonds, and retain the polymer weight to a large extent.
