Liquid crystal and photo-induced properties of polymers carrying pyridylazobenzene groups and iodopentafluorobenzene rings self-assembled through halogen bond

Castro-Pérez, Cinthya Valeska; Trejo‐Carbajal, Nayely; Rodríguez-González, Rosa Julia; Larios-López, Leticia; Felix-Serrano, Isaura; Navarro-Rodríguez, Dámaso

doi:10.1016/j.jfluchem.2019.05.003

Cited by 5 publications

(4 citation statements)

References 42 publications

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“…The halogen bonded complex demonstrates regular SRGs, which can be potentially used for optical data storage units. 67 Recently, Giese and coauthors reported a new strategy to control the XB-based LC and its photophysical behaviours (Figure 6). 68 They revealed that the halogen bond strength can be fine-tuned by adjusting the position and degree of fluorination at the XB donor.…”

Section: Tetrafluoro-4-iodophenyl) Diazenyl]aniline and 4-[(e)-2-(4-methoxyphenyl)-ethenyl]-pyridinementioning

confidence: 99%

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Halogen bonding regulated functional nanomaterials

et al. 2021

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Section: Tetrafluoro-4-iodophenyl) Diazenyl]aniline and 4-[(e)-2-(4-methoxyphenyl)-ethenyl]-pyridinementioning

confidence: 99%

Section: Halogen-bonding Induced Self-assembly In the Liquid State (L...mentioning

confidence: 99%

Halogen bonding regulated functional nanomaterials

et al. 2021

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“…Polymeric liquid crystalline materials, in which the photoresponsive mesogens are integrated within polymeric backbone offer additional advantages such as high processing and film forming ability and robustness. In 2019, Navarro‐Rodriguez and co‐workers synthesized azo(co)polymers ( PMMA‐ co‐ PAzPy ) bearing azobenzene pendants with pyridyl functionality as mesogens in methacrylate backbones that revealed smectic‐type order (Figure 3A) [35] . Interestingly, the lack of molecular order in the z‐axis upon complex formation with XB‐donating iodopentafluorobenzene ( IPFB ) leads to completely different packing in the co‐assembled state that altered the LC properties of the polymers.…”

Section: Halogen Bonded Covalent Polymeric Assemblies and Materialsmentioning

confidence: 99%

Recent Developments in Polymeric Assemblies and Functional Materials by Halogen Bonding

Biswas

Das

2021

ChemNanoMat

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Polymers have long been known to us for their versatile utility in our daily lives. With many years of successful advancement in controlled polymer synthesis and supramolecular chemistry, currently an amalgamation of these two fields is becoming increasingly important for generating modern‐day emerging polymeric materials. Hydrogen bonding and other noncovalent interactions like π‐stacking, host‐guest interaction, electrostatic interaction, metal‐ligand coordination have been explored much to this context, unlike the recently emerged halogen bonding, which indeed shows advantageous features like superior hydrophobicity, directionality and polar solvent resistance compared to ubiquitous hydrogen bonding. Hence, rendering these properties of halogen bonding into polymeric domain for generating functional materials for application in advance nanotechnologies is highly desirable. In the recent years, substantial progress has been made in fulfilling this challenging goal. This is evident from the escalating number of scientific publications in this research area every year. In this minireview, we have summarized the most recent developments in the field of halogen bonded polymeric assemblies and supramolecular polymers and discussed them in the context of their emerging materials properties and functions. Emphasis is given on highlighting various design criteria adopted in crystal engineering, covalent and supramolecular polymers in the past five years for constructing diverse organic functional materials, viz. liquid crystals, photoresponsive and photochromic materials, biomaterials and gels, self‐healing materials and many others by virtue of this highly directional supramolecular tool. In conclusion, a brief perspective on the advantages, challenges and future prospects in this rapidly growing field of research is discussed.

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“…This effect, known also as Angular Hole Burning (AHB) results on a macroscopic level formation of significant photoinduced anisotropy -birefringence and dichroism. Based on this unique property of the azobenzene-containing materials, they have been used for numerous applications -most often for reversible optical data storage [2][3][4] , tunable surface relief gratings [5][6][7] or diffractive optical elements with unique polarization properties [8][9][10] . The research on azopolymers during the last decades is also described in some milestone reviews [11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Diffraction efficiency of polarization holographic gratings recorded in azopolymer thin films coated using different solvents

Blagoeva

Nedelchev

Mateev

et al. 2020

Photosensitive Materials and Their Applications

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We present a study of the diffraction efficiencies of polarization holographic gratings recorded in thin films of the azopolymer PAZO (poly[1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt]). Two series of layers have been prepared using two different solvents-distilled water and methanol. The gratings are inscribed by two plain waves with orthogonal circular polarizations (left and right circular) from a He-Cd gas laser (442 nm) at recording angle 20°, corresponding to grating period 1.3 µm. Higher diffraction efficiency is obtained for the thin film samples spin-coated from the methanol solution for thicknesses below 600 nm. Diffraction efficiency higher than 27% was achieved, as well as surface relief height more than 500 nm.

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Liquid crystal and photo-induced properties of polymers carrying pyridylazobenzene groups and iodopentafluorobenzene rings self-assembled through halogen bond

Cited by 5 publications

References 42 publications

Halogen bonding regulated functional nanomaterials

Halogen bonding regulated functional nanomaterials

Recent Developments in Polymeric Assemblies and Functional Materials by Halogen Bonding

Diffraction efficiency of polarization holographic gratings recorded in azopolymer thin films coated using different solvents

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