Reversible photoresponsive chiral liquid crystal and multistimuli responsive organogels based on a cholesterol-azobenzene dimesogen

Tan, Xiaoping; Li, Zhi; Cheng, Xiaonong

doi:10.1039/c6ra00065g

Cited by 28 publications

(10 citation statements)

References 43 publications

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“…4b ). 18 The new series of azobenzene-based T-shaped asymmetric bolaamphiphiles (8) were synthesized, and their self-assembly behavior, photo-responsive behavior in their LC solution, and gel states were investigated. Such compounds can self-assemble into double-wall triangular and square honeycomb mesophases in their bulk states and organogels with different morphologies in various solvents.…”

Section: Azobenzene-based Gelmentioning

confidence: 99%

Gel scaffolds and emerging applications in biomedicine

Rajasekar

Lavanya

2022

RSC Adv.

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Section: Azobenzene-based Gelmentioning

confidence: 99%

Gel scaffolds and emerging applications in biomedicine

Rajasekar

Lavanya

2022

RSC Adv.

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“…In 2016, a study was reported on liquid crystal (LC) and gelation-based self-assembly, as well as the photoresponsive behavior of a new unsymmetrical azobenzene-cholesterol based dimesogen, 288 [77]. This molecule assembles a CN group at one end and a cholesterol carbonate, fixed through an oxyethylene spacer, to the opposite end of the azobenzene unit (Scheme 71).…”

Section: Cholesterol-based Gelatorsmentioning

confidence: 99%

“…The photoresponsive character was also proven in solution, in LC and gel states. These properties give to compound 288 potential applications in displays, as chiral mesogenic dye dopants, photochemical molecular switches, and new versatile LMGs [77].…”

Section: Cholesterol-based Gelatorsmentioning

confidence: 99%

Cholesterol-Based Compounds: Recent Advances in Synthesis and Applications

2018

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This review reports on the latest developments (since 2014) in the chemistry of cholesterol and its applications in different research fields. These applications range from drug delivery or bioimaging applications to cholesterol-based liquid crystals and gelators. A brief overview of the most recent synthetic procedures to obtain new cholesterol derivatives is also provided, as well as the latest anticancer, antimicrobial, and antioxidant new cholesterol-based derivatives. This review discusses not only the synthetic details of the preparation of new cholesterol derivatives or conjugates, but also gives a short summary concerning the specific application of such compounds.

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“…Introduction of the azobenzene moiety into the molecular structure of LC materials resulted in photo-switchable LCs 11 , 12 . Also, azo compounds have extended a variety of biological activities 13 – 15 , optical-switches, and non-linear optics (NLO) 1 , 16 – 21 . In addition, they have been used as absorbing dyes molecules 22 due to their ability for molecular trans/cis photo-isomerization when irradiated with UV light 23 .…”

Section: Introductionmentioning

confidence: 99%

New nematogenic conical-shaped supramolecular H-bonded complexes for solar energy investigations

Gomha

Ahmed

Shaban

et al. 2021

Sci Rep

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New conical-shaped geometrical supramolecular H-bonded liquid crystal complexes were formed through 1:2 intermolecular interactions of H-bonding between flexible core (adipic acid, A) and lateral chloro-substituted azopyridines (Bn). The chains of the terminally alkoxy substituted base (n) were changed between 8 and 16 carbons. Mesomorphic and optical examinations of the prepared complexes were measured via differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). Fourier-transform infrared spectroscopy (FT-IR) was used to confirm the Fermi bands of the H- bonding interactions. Induced nematogenic mesophases that cover the whole lengths of alkoxy-chains were detected. The non-linear geometries of the designed supramolecular complexes were also confirmed via Density functional theory (DFT) calculations. It was found that the length of terminal alkoxy chain of the base moiety highly affects the geometrical structure of the investigated complexes. Moreover, it increases the thermodynamic energy and influences the geometrical parameters. The electrical properties of each of the acid component (A), the base (B16) and their 1:2 complex (A/2B16) were evaluated using the Keithley measurement-source unit. The optical properties studies showed that the influences in the optical absorption and the reduction of the energy gap of the complex compared to its individual components made the resulted supramolecular H-bonded complex soft material suitable for solar energy investigations.

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Reversible photoresponsive chiral liquid crystal and multistimuli responsive organogels based on a cholesterol-azobenzene dimesogen

Abstract: Cholestrol-azobenzene dimesogens showing chiral induction and chiral amplification effects can self assemble into photoresponsive N* and SmC* phase and multiresponsive gels.

Cited by 28 publications

References 43 publications

Gel scaffolds and emerging applications in biomedicine

Gel scaffolds and emerging applications in biomedicine

Cholesterol-Based Compounds: Recent Advances in Synthesis and Applications

New nematogenic conical-shaped supramolecular H-bonded complexes for solar energy investigations

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