Syntéza nových helquatů a jejich vlastnosti

Joshi, Vishwas

The subject of this thesis comprises synthesis of novel helquats, exploration of their different properties, such as nonlinear optical properties, target-specific fluorescence light-up properties, molecular recognition properties (including chiral recognition of dsDNA using enantiopure helquat dyes) and their applicability based on these properties. Four novel helquats containing activated methyl groups were synthesized and one of the synthesized helquats has been successfully resolved in gram scale into two separate enantiomers for further applications. Synthesis of functionalized helquat derivatives employing Knoevenagel condensation reaction between helquats having activated methyl groups and various substituted aromatic and heteroaromatic aldehydes has been developed. This methodology opened an easy access to a structurally diverse library of more than 500 compounds via chromatography-free purifications in moderate to high yield. Members of this compound library have been explored in various directions: as novel nonlinear optical chromophores, target-specific fluorescence light-up probes for recognition of targets like heparin and dsDNA. Few helquat derivatives have shown fluorescence light-up in presence of AT-rich DNA sequences. This feature has been further studied in detail using various...

guest :: login Digital Repository
		Search		Submit		Help		About