Synthesis and characterisation of azobenzene-bridged cationic–cationic and neutral–cationic electrochromic materials

Gong, Cheng-Bin; He, Lin; Long, Jun-fei; Liu, Lantao; Liu, Song; Tang, Qian; Fu, Xiangkai

doi:10.1016/j.synthmet.2016.06.011

Cited by 17 publications

(2 citation statements)

References 72 publications

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“…The ligand azpy was prepared according to a reported method. 47 Single-crystal reflection data were collected on a Bruker D8 QUEST diffractometer equipped with a Cu Kα microfocus source (λ = 1.5406 Å) and a Photon 100 detector. Powder X-ray diffraction (PXRD) patterns were recorded on a PANalytical X’Pert MPD Pro (Cu Kα, λ = 1.5418 Å) with a 1D X’Celerator strip detector.…”

Section: Methodsmentioning

confidence: 99%

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Modulation of Water Vapor Sorption by Pore Engineering in Isostructural Square Lattice Topology Coordination Networks

Li,

Bezrukov,

Graham

et al. 2024

ACS Appl. Mater. Interfaces

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We report a crystal-engineering study conducted upon a platform of three mixed-linker square lattice (sql) coordination networks of general formula [Zn(Ria)(bphy)] [bphy = 1,2-bis(pyridin-4-yl)hydrazine, H 2 Ria = 5-position-substituted isophthalic acid, and R = −Br, −NO 2 , and −OH; compounds 1−3]. Analysis of single-crystal X-ray diffraction data of 1−2 and the simulated crystal structure of 3 revealed that 1−3 are isomorphous and sustained by bilayers of sql networks linked by hydrogen bonds. Although similar pore shapes and sizes exist in 1−3, distinct isotherm shapes (linear and S shape) and uptakes (2.4, 11.6, and 13.3 wt %, respectively) were observed. Ab initio calculations indicated that the distinct water sorption properties can be attributed to the R groups, which offer a range of hydrophilicity. Calculations indicated that the significantly lower experimental uptake in compound 1 can be attributed to a constricted channel. The calculated water-binding sites provide insights into how adsorbed water molecules bond to the pore walls, with the strongest interactions, water−hydroxyl hydrogen bonding, observed for 3. Overall, this study reveals how pore engineering can result in large variations in water sorption properties in an isomorphous family of rigid porous coordination networks.

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Section: Methodsmentioning

confidence: 99%

“…Commercially available reagents were used as received without further purification. The ligand azpy was prepared according to a reported method . Single-crystal reflection data were collected on a Bruker D8 QUEST diffractometer equipped with a Cu Kα microfocus source (λ = 1.5406 Å) and a Photon 100 detector.…”

Section: Methodsmentioning

confidence: 99%

Modulation of Water Vapor Sorption by Pore Engineering in Isostructural Square Lattice Topology Coordination Networks

Li,

Bezrukov,

Graham

et al. 2024

ACS Appl. Mater. Interfaces

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Supramolekulare Schalter auf der Basis von Cucurbit[8]uril (CB[8])

et al. 2018

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The use of cucurbit [8]uril as molecular host has emerged in the chemical literature as a reliable strategy for the creation of dynamic chemical systems, due to its ability to form homo and heteroternary complexes in aqueous media with appropriate molecular switches as guests. In that manner, CB[8]-based supramolecular switches can be designed in a predictable and modular fashion, through the election of appropriate guests able to condition the redox, photochemical or pH-triggered behaviour of tailored multicomponent systems. Furthermore, CB[8] allows the implementation of dual/triple and linear/orthogonal stimuli-dependent properties into these molecular devices by a careful election of the guests. This versatility on their design endows these supramolecular switches a huge potential for the rational development of new materials, where their function is not only determined by the custom-made stimuli-responsiveness, but also by the transient aggregation/disaggregation of homo or heteromeric building blocks. REVIEWThe capability of cucurbit[8]uril as molecular host to form homo and heteroternary complexes in aqueous media has fuelled its use in supramolecular switches. The use of those dynamic systems is especially interesting since they can be reversibly transformed by the application of external stimuli such as light, redox potential, or pH, and even allowing the implementation of orthogonal stimuli responsiveness.

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Cucurbit[8]uril (CB[8])‐Based Supramolecular Switches

et al. 2018

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The use of cucurbit[8]uril as a molecular host has emerged in the chemical literature as a reliable strategy for the creation of dynamic chemical systems, owing to its ability to form homo- and heteroternary complexes in aqueous media with appropriate molecular switches as guests. In this manner, CB[8]-based supramolecular switches can be designed in a predictable and modular fashion, through the selection of appropriate guests able to condition the redox, photochemical, or pH-triggered behavior of tailored multicomponent systems. Furthermore, CB[8] allows the implementation of dual/triple and linear/orthogonal stimuli-dependent properties into these molecular devices by a careful selection of the guests. This versatility in their design gives these supramolecular switches great potential for the rational development of new materials, in which their function is not only determined by the custom-made stimuli-responsiveness, but also by the transient aggregation/disaggregation of homo- or heteromeric building blocks.

show abstract

Synthesis and characterisation of azobenzene-bridged cationic–cationic and neutral–cationic electrochromic materials

Cited by 17 publications

References 72 publications

Modulation of Water Vapor Sorption by Pore Engineering in Isostructural Square Lattice Topology Coordination Networks

Modulation of Water Vapor Sorption by Pore Engineering in Isostructural Square Lattice Topology Coordination Networks

Supramolekulare Schalter auf der Basis von Cucurbit[8]uril (CB[8])

Cucurbit[8]uril (CB[8])‐Based Supramolecular Switches

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