@article {45645,
	title = {Counteranion driven homochiral assembly of a cationic C-3-symmetric gelator through ion-pair assisted hydrogen bond},
	journal = {Journal of the American Chemical Society},
	volume = {138},
	year = {2016},
	month = {SEP },
	pages = {11113-11116},
	type = {Article},
	abstract = {<p>The helical handedness in achiral self-assemblies is mostly complex due to spontaneous symmetry breaking or kinetically controlled random assembly formation. Here an attempt has been made to address this issue through chiral anion exchange. A new class of cationic achiral C-3-symmetric gelator devoid of any conventional gelation assisting functional units is found to form both right-and left-handed helical structures. A chiral counteranion exchange-assisted approach is successfully introduced to control the chirality sign and thereby to obtain preferred homochiral assemblies. Formation of anion-assisted chiral assembly was confirmed by circular dichroism (CD) spectroscopy, microscopic images, and crystal structure. The X-ray crystal structure reveals the construction of helical assemblies with opposite handedness for (+)- and (-)-chiral anion reformed gelators. The appropriate counteranion driven ion-pair-assisted hydrogen-bonding interactions are found responsible for the helical bias control in this C-3-symmetric gelator.</p>},
	issn = {0002-7863},
	doi = {10.1021/jacs.6b06312},
	author = {Maity, Arunava and Gangopadhyay, Monalisa and Basu, Arghya and Aute, Sunil and Babu, Sukumaran Santhosh and Das, Amitava}
}
