Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/7021
Title: | Synthesis, characterization and nonlinear optical studies of novel blue-light emitting room temperature truxene discotic liquid crystals |
Authors: | Vinayakumara, D.R. Kumar, Manish Sreekanth, P. Philip, Reji Kumar, Sandeep |
Issue Date: | 6-Mar-2015 |
Publisher: | Royal Society of Chemistry |
Citation: | RSC Advances, 2015, Vol. 5, p26596-26603 |
Abstract: | A new series of discotic liquid crystals based on a truxene core has been synthesized to study the structure–property relationship in view of the self-assembling property and their linear and nonlinear optical properties. All these branched alkyl chain truxene derivatives show a mesogenic property in a columnar hexagonal fashion at room temperature which is studied by a combination of different techniques. The newly synthesized truxene discotic 7a possesses a clearing temperature of 117 °C, one of the lowest clearing temperatures known in truxene discotic liquid crystals. We have discovered that the introduction of branching near to the core even in a small alkyl chain drastically reduces the isotropic temperature. Due to their C3 symmetry and their large first hyperpolarizability, these truxene derivatives show long-lived emissions in the solution state at room temperature. We also report large effective three-photon absorption in these materials under nanosecond laser pulse excitation at 532 nm, which makes them suitable candidates for optical limiting applications. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/7021 |
ISSN: | 2046-2069 (Online) |
Alternative Location: | http://dx.doi.org/10.1039/C5RA00873E |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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2015_RSC Advances_Vol.5_p26596–26603.pdf Restricted Access | Restricted Access | 1.32 MB | Adobe PDF | View/Open Request a copy |
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