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Ali GQ, Tomi IHR. Non-symmetrical bent-core homologous series bearing 1,2,4-oxadiazole core with a cholesterol terminal arm: Synthesis, characterization and their liquid crystalline properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2
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Rison S, Mathew AT, George L, Maiyalagan T, Hegde G, Varghese A. Pt Nanospheres Decorated Graphene-β-CD Modified Pencil Graphite Electrode for the Electrochemical Determination of Vitamin B6. Top Catal 2022. [DOI: 10.1007/s11244-021-01559-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Huang H, Cong Y, Du A, Hu B, Li J, Zhang B. Liquid crystalline dimers containing a cholesteryl group: Chiral smectic phases, and re-entrant TGBA* phase. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117920] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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4
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Bhat S V, Raghunathan V, Kumar S. Synthesis and mesomorphic characterization of some novel steroidal mesogens: A structure–property correlation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Chen ZP, Wang XJ, Meng LX, Wang JW, Jia YG. The effect of the position of chiral (−)-menthyl on the formation of blue phase and mesophase behavior in biphenyl-benzoate liquid crystals. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Veerabhadraswamy BN, Bhat SA, Hiremath US, Yelamaggad CV. Light-Emitting Chiral Nematic Dimers with Anomalous Odd-Even Effect. Chemphyschem 2019; 20:2836-2851. [PMID: 31517434 DOI: 10.1002/cphc.201900716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/12/2019] [Indexed: 11/06/2022]
Abstract
In this report, based on the results derived from the extensive study into the thermal and photophysical properties, an anomalous mesomorphic behavior of photoluminescent, chiral nematic (N*) liquid crystalline dimers, belonging to two different series has been revealed. They comprise cholesterol and fluorescent three-ring Schiff base or salicylaldimine core interlinked via an ω-oxyalkanoyloxy spacer of varying length and parity. The effect of molecular structure on the liquid crystal (LC) behavior and photophysical properties of both the series has been probed by varying the length of the terminal n-alkoxy tails for a fixed (odd or even) parity of the spacer. The detailed investigations using complementary techniques not only evidenced the existence of the N* phase in all the dimers synthesized but also the occurrence of an intriguing odd-even effect; blue phases (BPs) exist in all the dimers comprising even-membered spacer, which surprisingly remains totally absent in their odd-membered counterparts. While the results reported hitherto are exactly opposite to the aforesaid findings, this atypical behavior has been interpreted in terms of the over-all shape of the dimers rendered by the orientation of terminal tails. Photophysical studies carried out clearly revealed the intrinsic light emitting feature of the dimers not only in their dilute solutions but also in their three condensed states viz., solid, N* phase, and isotropic liquid state; the emission intensities of the N* phase varies with the change in temperature, as expected. CD spectra of the N* phase recorded as a function of temperature show bisignate CD band characteristically, signifying large chiral correlations in the molecular self-assembly, while the origin of bands from positive to negative region suggests a right-handed twist of the N* helix.
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Affiliation(s)
- B N Veerabhadraswamy
- Centre for Nano and Soft Matter Sciences, P. B. No. 1329, Prof. U. R. Rao Road, Jalahalli, Bengaluru, 560 013, INDIA
| | - Sachin A Bhat
- Centre for Nano and Soft Matter Sciences, P. B. No. 1329, Prof. U. R. Rao Road, Jalahalli, Bengaluru, 560 013, INDIA
| | - Uma S Hiremath
- Centre for Nano and Soft Matter Sciences, P. B. No. 1329, Prof. U. R. Rao Road, Jalahalli, Bengaluru, 560 013, INDIA
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7
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Devadiga D, Ahipa TN. Recent synthetic advances in pyridine-based thermotropic mesogens. RSC Adv 2019; 9:23161-23228. [PMID: 35514516 PMCID: PMC9067307 DOI: 10.1039/c9ra04389f] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 07/12/2019] [Indexed: 12/11/2022] Open
Abstract
Currently, numerous articles have reported pyridine-based thermotropic mesogens; however, reviews of their synthetic methodologies are rare. Therefore, the present critical review describes the recent synthetic advances in the field of pyridine-based thermotropic mesogens. Also, we discuss the various types of thermotropic mesogens (such as calamitic, discotic, bent-shaped, polycatenar, and polymeric mesogens) consisting of pyridine derivatives and their structure–property relationships. Currently, numerous articles have reported pyridine-based thermotropic mesogens; however, reviews of their synthetic methodologies are rare.![]()
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Affiliation(s)
- Deepak Devadiga
- Centre for Nano and Material Sciences, Jain University Jain Global Campus, Jakkasandra Post, Ramanagara District Bangalore-562 112 India
| | - T N Ahipa
- Centre for Nano and Material Sciences, Jain University Jain Global Campus, Jakkasandra Post, Ramanagara District Bangalore-562 112 India
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8
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Shanker G, Bindushree A, Chaithra K, Pratap P, Gupta RK, Achalkumar A, Yelamaggad C. Room temperature helical fluids in single-component systems. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.081] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Vinayakumara DR, Swamynathan K, Kumar S, Adhikari AV. Columnar self-assembly of novel benzylidenehydrazones and their difluoroboron complexes: structure–property correlations. NEW J CHEM 2019. [DOI: 10.1039/c9nj01192g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of prospective columnar liquid crystalline materials derived from novel organoboron complexes has been developed by virtue of their application in organic electronic devices.
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Affiliation(s)
- D. R. Vinayakumara
- Organic Materials Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka
- Mangalore-575 025
- India
| | | | - Sandeep Kumar
- SCM Group
- Raman Research Institute
- Bangalore-560 080
- India
| | - Airody Vasudeva Adhikari
- Organic Materials Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka
- Mangalore-575 025
- India
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10
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Nayak RA, Bhat SA, Shanker G, Rao DSS, Yelamaggad CV. Highly frustrated liquid crystal phases in optically active dimers: synthesis and rich phase transitional behavior. NEW J CHEM 2019. [DOI: 10.1039/c8nj03520b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New cholesterol-based Schiff base dimers exhibit a rich mesomorphism.
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Affiliation(s)
- Rashmi Ashwathama Nayak
- Centre for Nano and Soft Matter Sciences
- P. B. No. 1329
- Prof. U. R. Rao Road
- Jalahalli
- Bengaluru 560013
| | - Sachin A. Bhat
- Centre for Nano and Soft Matter Sciences
- P. B. No. 1329
- Prof. U. R. Rao Road
- Jalahalli
- Bengaluru 560013
| | - G. Shanker
- Department of Chemistry
- Jnana Bharathi Campus
- Sneha Bhavan
- Bangalore University
- Bengaluru
| | - D. S. Shankar Rao
- Centre for Nano and Soft Matter Sciences
- P. B. No. 1329
- Prof. U. R. Rao Road
- Jalahalli
- Bengaluru 560013
| | - C. V. Yelamaggad
- Centre for Nano and Soft Matter Sciences
- P. B. No. 1329
- Prof. U. R. Rao Road
- Jalahalli
- Bengaluru 560013
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11
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Sharma VS, Singh HK, Sharma AS, Shah AP, Shah PA. Bowl-shaped fluorescent liquid crystals derived from 4-tert butyl calix[4]arene and trans cinnamic acid derivatives. NEW J CHEM 2019. [DOI: 10.1039/c9nj03097b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of bowl-shaped molecules with a calix[4]arene rigid core appended by four-side and two-side substitution with trans 4-n-alkoxy cinnamic acid has been synthesized and well characterized.
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Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | - Hemant Kumar Singh
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Anuj S. Sharma
- Department of Chemistry, School of Science, Gujarat University
- Ahmedabad
- India
| | | | - Priyanka A. Shah
- Department of Chemistry, School of Science, Gujarat University
- Ahmedabad
- India
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Pradhan B, Chakraborty N, Gupta RK, Shanker G, Achalkumar AS. Nonsymmetrical cholesterol dimers constituting regioisomeric oxadiazole and thiadiazole cores: an investigation of the structure–property correlation. NEW J CHEM 2017. [DOI: 10.1039/c6nj03141b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of a bent angle on the stabilization of liquid crystalline and organogel self-assemblies.
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Affiliation(s)
- Balaram Pradhan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | | | | | - G. Shanker
- Department of Studies in Chemistry
- Bangalore University
- Bangalore
- India
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13
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Abstract
We have designed, synthesized and evaluated the physical properties of new fluorinated phenyltolane based chiral liquid crystal materials with 2-methylbutyl terminal chain.
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Affiliation(s)
- Jakub Herman
- Faculty of Advanced Technologies and Chemistry
- Military University of Technology
- 00-908 Warsaw 49
- Poland
| | - Przemysław Kula
- Faculty of Advanced Technologies and Chemistry
- Military University of Technology
- 00-908 Warsaw 49
- Poland
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Prabhu R, Yelamaggad CV. Structure–Property Correlations in Cyanobiphenyl-Based Dimer-Like Mesogens. J Phys Chem B 2015; 119:11935-52. [DOI: 10.1021/acs.jpcb.5b06073] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rashmi Prabhu
- Centre for Nano and Soft Matter Sciences, Prof.
U. R. Rao Road, Post Box No. 1329, Jalahalli,
Bengaluru 560013, India
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15
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Veerabhadraswamy BN, Rao DSS, Yelamaggad CV. Stable Ferroelectric Liquid Crystals Derived from Salicylaldimine-Core. J Phys Chem B 2015; 119:4539-51. [DOI: 10.1021/acs.jpcb.5b00209] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - D. S. Shankar Rao
- Centre for Nano and Soft Matter Sciences, Prof.
U. R. Rao Road, Post Box No. 1329, Jalahalli,
Bangalore 560 013, India
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16
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Veerabhadraswamy BN, Rao DSS, Prasad SK, Yelamaggad CV. Optically active, three-ring calamitic liquid crystals: the occurrence of frustrated, helical and polar fluid mesophases. NEW J CHEM 2015. [DOI: 10.1039/c4nj02011a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five enantiomeric (R&S) pairs of liquid crystalline Schiff-bases prepared show a ferroelectric SmC* phase, besides N* and BP phases.
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Affiliation(s)
- B. N. Veerabhadraswamy
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
| | - D. S. Shankar Rao
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
| | - S. Krishna Prasad
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
| | - C. V. Yelamaggad
- Centre for Nano and Soft Matter Sciences (Formerly Centre for Soft Matter Research)
- Bangalore 560 013
- India
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17
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Achalkumar AS, Shankar Rao DS, Yelamaggad CV. Non-symmetric dimers comprising chalcone and cholesterol entities: an investigation on structure–property correlations. NEW J CHEM 2014. [DOI: 10.1039/c4nj00426d] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-symmetric chiral dimers comprising chalcone and cholesterol entities have been prepared and studied for their structure property relations.
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18
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Yeap GY, Balamurugan S, Srinivasan MV, Kannan P. Synthesis and comparative study on phase transition behavior of triazole-cored liquid crystals armed with cholesterol and double or triple aromatic rings systems. NEW J CHEM 2013. [DOI: 10.1039/c3nj00053b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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