195007-60-4Relevant articles and documents
Self-Assembly Behavior of Diacetylenic Acid Molecules upon Vapor Deposition: Odd–Even Effect on the Film Morphology
Tseng, Chiao-Wei,Huang, Ding-Chi,Yang, Han-Li,Lin, Hsieh-Cheng,Li, Fang-Cheng,Pao, Chun-Wei,Tao, Yu-Tai
supporting information, p. 13948 - 13956 (2020/10/02)
A series of linear carboxylic acids containing diacetylenic units at different positions along the chain (C12H25(C≡C)2(CH2)nCOOH, n=7–11) were vacuum-deposited on clean silica substrates. The morphologies of the initial films after UV irradiation were studied. A clear odd–even effect on the morphology of the initial film was observed in that, depending on the spacer length between the diacetylenic unit and carboxyl head group, rings or dendrites of acid dimer layers were obtained. A molecular dynamic simulation of the aggregation process suggests that two competing intermolecular interactions and thus aggregation directions are involved and modulated by the odd or even carbon chain length. Further modulation of the interaction by substitution of a phenyl group at the terminus of the chain or by changing the carboxyl head group to an amidobenzoic acid head group led to a similar odd–even effect but with different dimensions or trends, which can be rationalized similarly. These results give the opportunity to create aligned conjugated polymer chains of different dimensions through self-assembly for applications in molecular/organic electronics.
Colorimetric reversibility of polydiacetylene supramolecules having enhanced hydrogen-bonding under thermal and pH stimuli
Ahn, Dong June,Chae, Eun-Hyuk,Lee, Gil Sun,Shim, Hee-Yong,Chang, Tae-Eun,Ahn, Kwang-Duk,Kim, Jong-Man
, p. 8976 - 8977 (2007/10/03)
To investigate the role of hydrogen-bonding on colorimetric transition of polydiacetylene supramolecules, novel diacetylene derivatives allowing various hydrogen-bonding states were synthesized by coupling carboxy-substituted (ortho-, meta-, and para-) an
