Second harmonic generation and crystal growth of substituted thienyl chalcone

Synthesis and biological evaluation of α, β-unsaturated ketone as potential antifungal agents

“…All the compounds synthesized were characterized spectroscopically Optical density of positive control and negative control was 0.35 and 0.01, respectively f Basaif et al (2005), g Dhar (1972), h Taylor et al (1980), i Goto et al (1991) Procedures for the synthesis of 1-(5-bromothiophen-2-yl)-3-(3,4-dimethoxyphenyl)prop-2-en-1-one (16) 3,4-Dimethoxybenzaldehyde (0.25 g, 0.0015 mol) was reacted with 2-acetyl-5-bromothiophene (0.189 g, 0.0015 mol) using the general procedure to obtain chalcone 16 ( 56.024, 110.165, 111.127, 118.296, 122.439, 123.368, 127.486, 131.293, 131.506, 144.766, 142.274, 149.255, 151.663, 180.847 Procedures for the synthesis of 3-(biphenyl-4-yl-1-(5-bromothien-2-yl)-)prop-2-en-1-one (18) Biphenyl-4-carboxaldehyde (0.25 g, 0.00137 mol) was reacted with 2-acetyl 5-bromothiophene (0.28 g, 0.00137 mol) using the general procedure to obtain chalcone 18 ( …”

“…Thus, in this study, various compounds were synthesized and tested for antifungal activity. Some of these chalcones have been reported earlier; however they have not been screened for antimicrobial activity (Hayashi et al, 1989;Tafi et al, 2002;Joo et al, 2003;Sivakumar et al, 2007;Meng et al, 2004;Basaif et al, 2005;Dhar, 1972;Taylor et al, 1980;Goto et al, 1991). The general scheme is shown in Scheme 1.…”

Growth and characterization of 2-amino-5-chlorobenzophenone (2A-5CB) single crystals

“…This indicates the possibility of reduced conversion efficiency of second harmonic generation (SHG) due to self-absorption of materials while using a semiconductor laser with 800 nm band [2,3]. Hence, recently there has been a search for newer organic NLO materials with blue light transmittance [4,5]. This paper deals with 2-amino-5-chlorobenzophenone (2A-5CB), an organic NLO crystal with promising optical and NLO properties.…”

Vibrational spectra analysis, NBO, HOMO–LUMO, and nonlinear optical behavior studies on 3-(3,4-dimethoxyphenyl)-1-(pyridin-2-yl)prop-2-en-1-one

“…These compounds have attracted increasing attention due to numerous pharmacological applications [3][4][5][6]. These compounds exhibit good second harmonic generation (SHG) efficiency, excellent blue light transmittance [7,8], good crystallizability [9][10][11][12], better optical limiting behavior with nanosecond laser pulses at 532 nm wavelength [13], and ultrafast optical nonlinearities at 780 nm [14]. Studies on chalcones suggest that the secondorder molecular nonlinearity can be enhanced by large delocalized p-electron systems with strong donor and acceptor groups [15].…”