@article { ISI:000269664200021,
	title = {Catalytic synthesis of chalcone and flavanone using Zn-Al hydrotalcite adhere ionic liquid},
	journal = {Catalysis Communications},
	volume = {10},
	number = {14},
	year = {2009},
	month = {AUG},
	pages = {1881-1888},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>The Claisen-Schmidt condensation of 2{\textquoteright}-hydroxy acetophenone and benzaldehyde to chalcone and flavanone show that calcined Zn-Al (6) hydrotalcite is active for this synthesis. Coating of ionic liquid {\textquoteleft}1-(tri-ethoxy-silyl-propyl)-3-methyl-imidazolium chloride{\textquoteright} on Zn-Al hydrotalcites was accomplished employing incipient wetness process and on NaY, NaX, MK-5 and silica gel employing co-condensation methodology. Impregnated IL on calcined Zn-Al (6) catalysts were characterized by XRD, SEM, BET, (13)C and (27)Al NMR analysis and the activity of these catalysts were investigated for chalcone and flavanone synthesis. (27)Al CP MAS NMR technique was used to show that interaction of IL with hydrotalcite modifies the acid-base sites and is responsible for enhancement of catalyst activity. Several aromatic aldehydes were screened to assess the general applicability of the system. (c) 2009 Published by Elsevier B.V.</p>},
	keywords = {(27)Al CP MAS NMR, chalcone, Claisen-Schmidt condensation, Flavanone, Ionic liquid, Zn-Al hydrotalcite},
	issn = {1566-7367},
	doi = {10.1016/j.catcom.2009.06.018},
	author = {Kunde, Lalita B. and Gade, Swapna M. and Kalyani, Vishwanath S. and Gupte, Sunil P.}
}
@article { ISI:000293196800041,
	title = {Isobutrin from butea monosperma (flame of the forest): a promising new natural sensitizer belonging to chalcone class},
	journal = {ACS Applied Materials \& Interfaces},
	volume = {3},
	number = {7},
	year = {2011},
	month = {JUL},
	pages = {2440-2444},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {<p>In this work, {\textquoteleft}{\textquoteleft}isobutrin{\textquoteright}{\textquoteright}, an ecofriendly sensitizer that is extracted from Butea monosperma (commonly known as {\textquoteleft}{\textquoteleft}Flame of the Forest{\textquoteright}{\textquoteright}) flowers, is introduced. It is a bright yellow pigment belonging to the chalcone class and is examined as a sensitizer for optoelectronic applications. It is observed that chelation of this dye with Ti ions results into a strong dye-TiO(2) charge transfer (DTCT) band in the visible region. This Ti-Isobutrin chelate is stable, irreversible and its formation is studied using Benesi-Hildebrand plot. The locations of HOMO-LUMO states of the Ti-isobutrin chelate and the corresponding band alignment with TiO(2) are obtained. Also, a thermal stability test revealed that isobutrin is stable above 100 degrees C.</p>},
	keywords = {Butea monosperma, chalcone, dye-sensitized solar cell, isobutrin, sensitizer, TiO(2)},
	issn = {1944-8244},
	doi = {10.1021/am200341y},
	author = {Agarkar, Shruti A. and Kulkarni, Roshan R. and Dhas, Vivek V. and Chinchansure, Ashish A. and Hazra, Partha and Joshi, Swati P. and Ogale, Satishchandra B.}
}
