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Synthesis and phase behavior of dendrons derived from 3,4,5-tris(tetradecyloxy)benzoic acid with different functional groups in focal point

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Abstract

A number of dendrons of various chain lengths derived from the esters of 3,4,5-tris(tetradecyloxy)benzoic acid were synthesized. These esters were used as building blocks in the design of polyester molecules. Intermediate products, such as branched compounds with variation of functional groups in focal point (aromatic acids and their benzyl esters, aldehydes of different generation) were obtained. The structure and purity of all the compounds were determined by elemental analysis, FT-IR, NMR spectroscopy, mass spectrometry (MALDI-ToF). The phase behavior was investigated by differential scanning calorimetry and confirmed by polarized optical microscopy. Consequently, it was established that the liquid-crystalline properties of this series of dendrons arise from the degree of branching. This behavior can be explained by the formation of hydrogen bonds, as well as microsegregation processes of the links of the macromolecule.

A new series of compounds derived from esters of 3,4,5-tris(tetradecyloxy)benzoic acid were synthesized. It was established that the liquid-crystalline properties of this series of dendrons arise from the degree of branching. This behavior can be explained by the formation of hydrogen bonds as well as processes of microsegregation of the links of the macromolecule.

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Acknowledgements

This work was supported by the grant of Russian Foundation for Basic Research No. 14-03-31280-mol_a and the grant of the President of the Russian Federation (No. MK-70.2014.3). Dr. Akopova O.B. is thankful for the grant of Ministry of education and science RF (No. 4.106.2014K). EA, NMR, FT-IR spectroscopy and DSC analysis were carried out by the equipments of Interlaboratory scientific center «Verhnevolzhskij region center of physicochemical researching». The authors would like to thank Dr. Simon Dalgleish (Nagoya University) for useful discussion.

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Correspondence to MATVEY GRUZDEV.

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Supplementary information (SI)

All additional information pertaining to characterization of the compounds using NMR spectra, FT-IR spectra and mass-spectra are given in the supporting information. The electronic supporting information can be seen in www.ias.ac.in/chemsci.

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GRUZDEV, M., CHERVONOVA, U., AKOPOVA, O. et al. Synthesis and phase behavior of dendrons derived from 3,4,5-tris(tetradecyloxy)benzoic acid with different functional groups in focal point. J Chem Sci 127, 1801–1810 (2015). https://doi.org/10.1007/s12039-015-0945-4

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  • DOI: https://doi.org/10.1007/s12039-015-0945-4

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