The key building blocks,tetrachlorinated terrylene diimides and the targeted sila-annulated terrylene diimides(Si-TDIs and 2Si-TDIs)were synthesized for the first time.Single-crystal analysis verified the almost plana...The key building blocks,tetrachlorinated terrylene diimides and the targeted sila-annulated terrylene diimides(Si-TDIs and 2Si-TDIs)were synthesized for the first time.Single-crystal analysis verified the almost planar molecular configurations of both Si-TDIs and 2Si-TDIs.They exhibited intriguing optical properties including red-shifted absorption and near-infrared emission properties with excellent fluorescence quantum yields,as well as precisely controlled HOMO/LUMO energy levels by Si-heteroannulation.The single-crystal organic field-effect transistors based on 2Si-TDI 5a featuring long and branched alkyl chains demonstrated well-balanced ambipolar transporting properties with electron/hole mobilities of 0.10/0.18 cm2 V^(−1)s^(−1).展开更多
We consider the photon emission statistical properties of a single molecule under pump-probe field driving, using the generating function method. The first- and second-order moments of statistical quantities are prese...We consider the photon emission statistical properties of a single molecule under pump-probe field driving, using the generating function method. The first- and second-order moments of statistical quantities are presented. Derived from the first-order moment, the line shapes are in good agreement with the experimental results. Derived from the second-order moment, Mandel＇s Q parameters show an obvious quantum effect of photon statistical distribution, i.e., the anti-bunching effect.展开更多
Terrylene diimides with four aromatic heterocycles(AHTDIs)were synthesized under Stille Cross-coupling conditions and fully characterized by NMR and mass spectrometry.The aggregation of the terrylene diimide(TDI)was s...Terrylene diimides with four aromatic heterocycles(AHTDIs)were synthesized under Stille Cross-coupling conditions and fully characterized by NMR and mass spectrometry.The aggregation of the terrylene diimide(TDI)was suppressed by four heterocycles substituents on the bay region,and these AHTDIs exhibited good solubility in common organic solvents.The effects of the substituted groups on the optical and electrochemical properties were also investigated.The introduction of four aromatic heterocycles on the bay of TDI resulted in significant red-shifts of the absorption peak(100 nm),corresponding to a decrease in the band gap from 1.82 to 1.50 eV.Furthermore,with four rich electron aromatic heterocycles,the AHTDIs showed 280 mV negative-shifts of first oxidation poten-tials and a new oxidation wave,corresponding to an increase in the HOMO levels from−5.60 to−5.28 eV.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(NSFC,Nos.21901138,21790361 and 22122503)the Shandong Provincial Natural Science Foundation(No.ZR2019ZD50)China Fundamental Research Funds for the Central Universities(No.2-9-2020-041).
文摘The key building blocks,tetrachlorinated terrylene diimides and the targeted sila-annulated terrylene diimides(Si-TDIs and 2Si-TDIs)were synthesized for the first time.Single-crystal analysis verified the almost planar molecular configurations of both Si-TDIs and 2Si-TDIs.They exhibited intriguing optical properties including red-shifted absorption and near-infrared emission properties with excellent fluorescence quantum yields,as well as precisely controlled HOMO/LUMO energy levels by Si-heteroannulation.The single-crystal organic field-effect transistors based on 2Si-TDI 5a featuring long and branched alkyl chains demonstrated well-balanced ambipolar transporting properties with electron/hole mobilities of 0.10/0.18 cm2 V^(−1)s^(−1).
基金Supported by the Project of Xuzhou Institute of Technology under Grant No XKY2014309the National Natural Science Foundation of China under Grant Nos 11304266 and 11447149
文摘We consider the photon emission statistical properties of a single molecule under pump-probe field driving, using the generating function method. The first- and second-order moments of statistical quantities are presented. Derived from the first-order moment, the line shapes are in good agreement with the experimental results. Derived from the second-order moment, Mandel＇s Q parameters show an obvious quantum effect of photon statistical distribution, i.e., the anti-bunching effect.
基金This work was supported by Hebei Province for Dis-tinguished Young Scholar(No.B2012201031)the Na-tional Natural Science Foundation of China(No.21274036)+1 种基金the Program for New Century Excellent Talents in University(No.NCET-12-0684)Training Program for Innovative Research Team and Leading talent in Hebei Province University(No.LJRC024).
文摘Terrylene diimides with four aromatic heterocycles(AHTDIs)were synthesized under Stille Cross-coupling conditions and fully characterized by NMR and mass spectrometry.The aggregation of the terrylene diimide(TDI)was suppressed by four heterocycles substituents on the bay region,and these AHTDIs exhibited good solubility in common organic solvents.The effects of the substituted groups on the optical and electrochemical properties were also investigated.The introduction of four aromatic heterocycles on the bay of TDI resulted in significant red-shifts of the absorption peak(100 nm),corresponding to a decrease in the band gap from 1.82 to 1.50 eV.Furthermore,with four rich electron aromatic heterocycles,the AHTDIs showed 280 mV negative-shifts of first oxidation poten-tials and a new oxidation wave,corresponding to an increase in the HOMO levels from−5.60 to−5.28 eV.
