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311.
Perumal Rajakumar Chinnadurai Satheeshkumar Sebastian Raja 《Tetrahedron letters》2010,51(39):5167-5172
Fréchet-type dendrimers with hole-transporting diphenylamine as surface group and electron-transporting triazole moiety as building block have been synthesized by convergent synthetic strategy through ‘click chemistry’ methodology. First generation dendrimer exhibits longer relaxation time, higher quantum yield in the fluorescence spectrum, and better thermal stability than the zero and second generation dendrimers. CV studies showed irreversible reduction potential and the formation of radical cation due to diphenylamine moiety. 相似文献
312.
Jayabharathi J Thanikachalam V Venkatesh Perumal M Srinivasan N 《Journal of fluorescence》2012,22(1):409-417
Novel imidazole derivatives were synthesized and its crystal structure has been studied by single crystal XRD analysis. The
photophysical properties of these imidazole derivatives were studied in several solvents, which include a wide range of apolar,
polar and protic media. The observed lower fluorescence quantum yield may be due to an increase in the non-radiative deactivation
rate constant. This is attributed to a loss of planarity in the excited state provided by the non co-planarity of the aryl
rings attached to C(2) and N(1) atoms of the imidazole ring. Such a geometrical change in the excited state leads to an important
Stokes shift, reducing the reabsorption and reemission effects in the detected emission in highly concentrated solutions.
The highest fluorescence quantum yield of the imidazole derivatives are observed in polar media. 相似文献
313.
314.
Gopi Perumal Karthick Govindan Alageswaran Jayaram Sarvesweri Sundaramoorthi Wei-Yu Lin 《中国化学会会志》2023,70(2):145-158
Herein, azadipeptidomimetic molecules were designed and synthesized using a quinoline-histidine-amino acid sequence with terminal amino acid modification. In-silico studies were carried out to evaluate the compound's HIV protease-1 inhibition temperament. In-vitro anti-proliferative possessions of the test compounds were studied by executing a series of experiments, namely DNA binding, bovine serum albumin (BSA) binding capability, and cytotoxicity assay on MCF-7 cells. The molecule 5j exhibited remarkable results in all experiments; it has an excellent DNA binding constant (3.76 × 105), higher serum albumin unbound concentration of 5.96%, and a significant antiproliferative effect on MCF-7 cells with IC50 value 0.31 nM. 相似文献
315.
G. Ompraba M. Srinivasan S. Perumal K. Sekar A. R. Choudhury T. N. Guru Row Z. A. Rafi 《Crystal Research and Technology》2003,38(10):918-921
The crystal structure of the title compound is described. The chemical formula of the compound is C23H19Cl2NO. The compound is found to crystallize in monoclinic system with space group P21/c, Z = 4. The unit cell dimensions are a = 15.137(3) Å, b = 8.9171(18) Å, c = 14.779(3) Å, β = 91.461(4)° and V = 1994.2(7) Å3, Dcalc = 1.320 gcm‐3. The final R factor is 4.4%. The central piperidone ring of the molecule adopts a slightly distorted chair conformation, the mean torsion angle being 52.3°; the phenyl rings are planar. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献