Construction of photoswitchable urea-based multiple H-bonding motifs

Chen, Lan-Yun; Lü, Wei; Yu, Hai; Liu, Lijuan; Zhang, Kang‐Da; Zhan, Tian‐Guang

doi:10.1016/j.tet.2023.133343

Cited by 1 publication

(1 citation statement)

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“…In the latter case a conformational change was also necessary to adopt the ADDA H-bonding pattern (Z58 ). Homo-and heterocomplexes could be constructed reversibly from pyrimidinedione (E59, Scheme 14) and pyridyl derivatives (E60), respectively, although association constants were considerably lower than those observed for the azobenzene-substituted UPy E58 [77]. Photoisomerization of similar systems can lead to development of photo-responsive supramolecular polymers [78].…”

Section: Redox-active Urea Derivativesmentioning

confidence: 99%

Urea-Functionalized Heterocycles: Structure, Hydrogen Bonding and Applications

Keszei,

Váradi,

Skoda-Földes

2023

Molecules

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Ureido-heterocycles exhibiting different triple- and quadruple H-bonding patterns are useful building blocks in the construction of supramolecular polymers, self-healing materials, stimuli-responsive devices, catalysts and sensors. The heterocyclic group may provide hydrogen bond donor/acceptor sites to supplement those in the urea core, and they can also bind metals and can be modified by pH, redox reactions or irradiation. In the present review, the main structural features of these derivatives are discussed, including the effect of tautomerization and conformational isomerism on self-assembly and complex formation. Some examples of their use as building blocks in different molecular architectures and supramolecular polymers, with special emphasis on biomedical applications, are presented. The role of the heterocyclic functionality in catalytic and sensory applications is also outlined.

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Section: Redox-active Urea Derivativesmentioning

confidence: 99%