148080-33-5Relevant academic research and scientific papers
Novel Push-Pull Thiophenes for Second Order Nonlinear Optical Applications
Rao, V. Pushkara,Jen, Alex K-Y.,Wong, K. Y.,Drost, Kevin J.
, p. 1747 - 1750 (1993)
Second order molecular nonlinear optical properties of push-pull stilbenes can be substantially increased by replacing benzene rings with thiophene rings.Synthesis and molecular nonlinear optical properties of several dialkylamino-nitro substituted thioph
The design of nonlinear optical chromophores exhibiting large electro-optic activity and high thermal stability: The role of donor groups
Liu, Fenggang,Xiao, Hongyan,Yang, Yuhui,Wang, Haoran,Zhang, Hua,Liu, Jialei,Bo, Shuhui,Zhen, Zhen,Liu, Xinhou,Qiu, Ling
, p. 138 - 147 (2016/03/30)
A novel chromophore based on N-(4-dibutylaminophenyl)tetrahydroquinolinyl donor group was synthesized to compare with traditional chromophores based on either diethylaminophenyl or triarylaminophenyl donor groups. Cyclic voltammetry measurements showed th
Tunable two-photon absorption near-infrared materials containing different electron-donors and a π-bridge center with applications in bioimaging in live cells
Kong, Ming,Wang, Ting,Tian, Xiaohe,Wang, Fang,Liu, Yanqiu,Zhang, Qiong,Wang, Hui,Zhou, Hongping,Wu, Jieying,Tian, Yupeng
, p. 5580 - 5588 (2015/06/08)
A series of asymmetrical D-π-D type thiophene-based chromophores with small sizes and different electron-donating groups were designed and synthesized in high yield. Single-crystal X-ray diffraction analysis and theoretical calculations were carried out t
Novel organic dyes for efficient dye-sensitized solar cells
Li, Shao-Lu,Jiang, Ke-Jian,Shao, Ke-Feng,Yang, Lian-Ming
, p. 2792 - 2794 (2008/09/19)
Two novel metal-free organic dyes containing thienothiophene and thiophene segments have been synthesized. Nano-crystalline TiO2 dye-sensitized solar cells were fabricated using these dyes as light-harvesting sensitizers, and a high solar energ
Trivalent Boron as an Acceptor in Donor - π - Acceptor-Type Compounds for Single- and Two-Photon Excited Fluorescence
Liu, Zhi-Qiang,Fang, Qi,Wang, Dong,Cao, Du-Xia,Xue, Gang,Yu, Wen-Tao,Lei, Hong
, p. 5074 - 5084 (2007/10/03)
The synthesis, structure, and fluorescence properties of a series of new donor - π - acceptor (D - π - A) type compounds, with a trivalent boron, protected by two mesityl groups, as acceptor, and with various typical donors and different π-conjugated bridges, are reported. All these stable organoboron compounds show intense single-photon excited fluorescence (SPEF) and two-photon excited fluorescence (TPEF) in a wide spectral range from blue to green, with the spectral peak position of the SPEF being basically the same as that of the TPEF. The remarkably strong C-B(mesityl)2 bonding, and the well-conjugated π-system, shown in X-ray crystal structures of two compounds, indicate some charge transfer features of the ground state. Meanwhile, spectral data indicate that the charge transfer from donor to acceptor is greatly enhanced in the excited states. Based on typical structural data and comprehensive spectral data, the following structure - property relationships can be drawn: 1) the moderate arylamino donor can more effectively enhance the SPEF and TPEF intensities than can the strong alkylamino donor; 2) stilbene is a better π-bridge than styrylthiophene for its capability of enhancing and blue-shifting the SPEF and TPEF of the corresponding D - π - A compounds; and 3) when compared to its boron-free precursors and other analogues, -B(mesityl)2 invariably and consistently acts as an effective SPEF and TPEF fluorophore in all this series of organoboron compounds, which may result from its strong π -electron-withdrawing and charge transfer-inducing nature in the ground-state and, more dominantly, in the excited-state. Combining all the above positive structure factors, trans-4′-N,N-diphenylamino-4-dimesitylborylstilbene (compound 3) stands out as the optimized green SPEF and TPEF emitter. This compound exhibits an SPEF quantum yield φ of 0.91 at 522 nm in THF, a TPEF cross-section σ′ that is an order of magnitude larger than that of its boron-free precursor upon excitation by 800 nm femto-second laser pulses, and a two-photon absorption section a of 3.0 × 10-48 cm 4 s. In the blue light region, trans-4′ -N-carbazolyl-4-dimesitylborylstilbene (compound 4) shows significant SPEF and TPEF properties, with φ = 0.79 at 464 nm in THF and a large σ′ value, which is five times that of fluorescein upon excitation by 740 nm femto-second laser pulses.
Functionalized Thiophenes: Second-order Nonlinear Optical Materials
Jen, Alex K-Y.,Rao, V. Pushkara,Wong, K. Y.,Drost, Kevin J.
, p. 90 - 92 (2007/10/02)
It is shown experimentally that the complete replacement of benzene rings with thiophene rings in a donor-acceptor substituted stilbene significantly enhances its second-order nonlinear optical hyperpolarizability (β); results obtained with a series of th
