Pyrazine luminogens with “free” and “locked” phenyl rings: Understanding of restriction of intramolecular rotation as a cause for aggregation-induced emission

Anjun Qin; Lam, Jacky W. Y.; Mahtab, Faisal; Jim, Cathy K. W.; Li Tang; Jingzhi Sun; Sung, Herman H. Y.; Williams, Ian D.; Ben Zhong Tang
June 2009
Applied Physics Letters;6/22/2009, Vol. 94 Issue 25, p253308
Academic Journal
Nitrogen-containing heterocyclic pyrazine luminogens with “free” (1) and “locked” (2) phenyl rings were readily prepared in high yields. The propeller-shaped luminogen 1 shows aggregation-induced emission feature, whereas the disk-shaped chromophore 2 shows conventional aggregation-caused quenching effect, offering a direct evidence to support our hypothesis that restriction of intramolecular rotation is the main cause for the AIE phenomenon.


Related Articles

  • Causes of efficiency roll-off in phosphorescent organic light emitting devices: Triplet-triplet annihilation versus triplet-polaron quenching. Song, Dandan; Zhao, Suling; Luo, Yichun; Aziz, Hany // Applied Physics Letters;12/13/2010, Vol. 97 Issue 24, p243304 

    Delayed electroluminescence measurements are used to probe and differentiate between triplet-triplet-annihilation (TTA) and triplet-polaron-quenching (TPQ) processes and their correlation with efficiency roll-off in fac-tris(2-phenylpyridine) iridium-based phosphorescent organic light emitting...

  • Fluorescence properties of a composite material based on the 5CB nematic liquid crystal with gold nanoparticles. Piryatinski, Yu.; Vakhnin, A.; Verbitskii, A.; Kadashchuk, A. // Physics of the Solid State;Nov2011, Vol. 53 Issue 11, p2333 

    The steady-state and time-resolved fluorescence spectra of n-pentyl- n′-cyanobiphenyl and a related composite material with gold nanoparticles in the liquid crystalline and solid states have been investigated. The introduction of gold nanoparticles into the liquid crystal leads to a...

  • Part II: Basics of intensive quenching. Kobasko, Nikolai I. // Advanced Materials & Processes;Aug96, Vol. 150 Issue 2, p40CC 

    Part II. Describes various aspects of metal-quenching processes. Rise and fall of surface compressive stresses during cooling; Optimum depth of quenched layer; Predicting optimum quenched layer thickness.

  • Maintaining quench oils. Wachter, Donald A.; Totten, George E. // Advanced Materials & Processes;Feb97, Vol. 151 Issue 2, p48AA 

    Describes a quench bath maintenance procedure for controlling quality of oil quenching process. Quench oil characterization strategy; Determination of oil's physical properties; Cooling curve analysis; Primary functions of quench oil; Facilitation of hardening of steel; Enhancement of wetting...

  • Evaluation of adhesion of diamond coating by thermal quench method. Fan, Qi Hua; Fernandes, A.; Pereira, E.; Gracio, J. // Journal of Applied Physics;5/15/1998, Vol. 83 Issue 10, p5588 

    Provides information on an experiment using a thermal quench method combined with micro-Raman spectroscopy to investigate the adhesion of a diamond coating on metal. Methodology used to conduct the experiment; Listing of substrates used in the experiment; How comparable is the coating adhesion...

  • Erratum to: The effect of long term aging on the structural and optical properties of nano metallo-tetraphenylporphine films. El-Denglawey, A.; Makhlouf, M.; Dongol, M.; El-Nahass, M. // Journal of Materials Science: Materials in Electronics;Aug2015, Vol. 26 Issue 8, p5610 

    A correction to the article on "The effect of long term aging on the structural and optical properties of nano metallo-tetraphenylporphine films" in the June 10, 2015 issue is presented.

  • Hydroxystilbenes in the roots of Rheum rhaponticum. Aaviksaa, Aavo; Hagaa, Mati; Kuzina, Kristina; Pussac, Tõnu; Raal, Ain; Tsoupras, George // Proceedings of the Estonian Academy of Sciences, Chemistry;Sep2003, Vol. 52 Issue 3, p99 

    Stilbene derivatives trans-3,4',5-trihydroxystilbene (resveratrol) and its 3-O-β-D-glucopyranoside (piceid), trans-3,5-dihydroxy-4'-methoxystilbene (deoxyrhapontigenin) and its 3-O-β-D-glucopyranoside (deoxyrhapontin), trans-3,3',5-trihydroxy-4'-methoxystilbene (rhapontigenin) and its...

  • Cloning and sequence analyses of a 2,3-dihydroxybiphenyl 1,2-dioxygenase gene ( bphC) from Comamonassp. SMN4 for phylogenetic and structural analysis. Lee, N.R.; Kwon, D.Y.; Min, K.H. // Journal of Industrial Microbiology & Biotechnology;Apr2003, Vol. 30 Issue 4, p245 

    A genomic library of biphenyl-degrading Comamonas sp. SMN4 for isolating fragments containing the 2,3-dihydroxybiphenyl 1,2-dioxygenase (23D-BDO) gene was constructed. The smallest subclone (pNPX9) encoding 23DBDO activity was sequenced and analyzed. The C-terminal domain of 23DBDO from...

  • High-pressure Raman scattering in dimethyl phenyl silanol. Cansell, F.; Petitet, J. P.; Fabre, D. // Journal of Applied Physics;4/15/1989, Vol. 65 Issue 8, p3280 

    Presents a study that examined the Raman scattering of dimethyl phenyl silanol in a diamond anvil cell. Analysis of the pressure dependance of Raman frequencies; Measurement of the pressure; Examination of the changes in the chemical bonds.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics