778593-53-6Relevant academic research and scientific papers
Thermochromic and highly tunable color emitting bis-tolane based liquid crystal materials for temperature sensing devices
Irfan, Majeed,Sumra, Idrees,Zhang, Mei,Song, Zicun,Liu, Tingting,Zeng, Zhuo
, (2021/03/18)
The luminescent compounds based on the D-π-A system consisting of substituted pyrrole as acceptor, π conjugated bis-tolane and -OMe, -N(CH3)2, -N(Ph)2 at termini acting as donors have been synthesized. On heating, all the compounds exhibited distinct mesomorphic behavior depending upon donating groups and substituents at the acceptor unit. These luminescent liquid crystals exhibited emission from blue, green to reddish orange with high quantum efficiency in solid as well in solutions state. We discovered the rarely reported three membered ring interactions between the Br at alpha position of pyrrole and acetylene bond and their impact on luminescence efficiency via single crystal structure of 2Br–CN–N(CH3)2 and 2Br–CN–N(Ph)2. Furthermore, the thermochromic behavior of these LLCs compounds has been explored, especially CN–N(Ph)2, its reddish orange emission changed to blue at 240 °C–250 °C in pure state, while in dimethyl silicone polymer (PDMS) film, it switched to blue at 200 °C and completely vanished at 240 °C. These simple and highly emissive compounds display outstanding thermochromic properties above 200 °C, thus will be potentiality valuable for high temperature sensing devices.
Multi-color photoluminescence induced by electron-density distribution of fluorinated bistolane derivatives
Yamada, Shigeyuki,Morita, Masato,Konno, Tsutomu
, p. 54 - 64 (2017/09/18)
The aim of this study was to design and develop new fluorinated light-emitting materials with multi-color photoluminescence that are not limited by their states. For this purpose, fluorinated bistolanes with an amino substituent, such as carbazol-9-yl, di
Convenient methods for preparing ?-conjugated linkers as building blocks for modular chemistry
Kulhanek, Jiri,Bures, Filip,Ludwig, Miroslav
supporting information; experimental part, (2010/04/22)
Simple, straightforward and optimized procedures for preparing extended ?-conjugated linkers are described. Either unsubstituted or 4-donor substituted ?-linkers bearing a styryl, biphenyl, phenylethenylphenyl, and phenylethynylphenyl ?-conjugated backbone are functionalized with boronic pinacol esters as well as with terminal acetylene moieties allowing their further use as building blocks in Suzuki-Miyaura or Sonogashira coupling reactions.
Synthesis of conjugated 2 and 2,5-(ethenyl) and (ethynyl)phenylethynyl thiophenes: Fluorescence properties
Rodriguez, J. Gonzalo,Esquivias, Jorge,Lafuente, Antonio,Rubio, Laura
, p. 3112 - 3122 (2007/10/03)
Nano conjugated thienylethenyl and thienylethynyl compounds with controlled structure and dimensions have been efficiently prepared, by heterocoupling reaction between 1,4-(thienylethynyl)phenylacetylene (or thienylethenyl) phenylacetylene and 2- or 2,5-dihalothiophene. Conjugated 1,4-di(2- thienylethynylphenyl)- (or 2-thienylethenylphenyl)-1,3-butadiyne were obtained by the homocoupling of the terminal acetylenes in excellent yield. The end-capped (N,N-dimethylaminophenyl)- and [3,5-di(trimethylsilylethynyl)-1- ethynyl]-2,5-di(phenylethynyl)nthiophene were obtained by the heterocoupling between the corresponding terminal acetylene and 2,5-di(iodo)thiophene, catalyzed by the bis(triphenylphosphine)palladium and cuprous iodide system in excellent yield.
Synthesis and optical properties of conjugated N,N-dimethyl and thienyl end-capped 2,5-(arylethynyl)thiophene oligomer structures
Rodríguez, J. Gonzalo,Lafuente, Antonio,Rubio, Laura,Esquivias, Jorge
, p. 7061 - 7064 (2007/10/03)
End-capped (N,N-dimethylaminophenyl) and 2′-thienylethynyl 2,5-thiophene oligomer structures were synthesized by heterocoupling between the terminal acetylenes such as: p-(N,N-dimethylaminophenyl)ethyne (3) [or 1-(p-(N,N-dimethylaminophenyl)-2-p-(ethynylp
