1407974-60-0Relevant articles and documents
Influence of functional groups on the self-assembly of liquid crystals
Tan, Shanchao,Tao, Jiayu,Luo, Wendi,Jiang, Hao,Liu, Yuhong,Xu, Haijun,Zeng, Qingdao,Shi, Hongyu
, p. 1149 - 1152 (2020/10/12)
Functional groups in the molecule play an important role in the molecular organization process. To reveal the influence of functional groups on the self-assembly at interface, herein, the self-assembly structures of three liquid crystal molecules, which only differ in the functional groups, are explicitly characterized by using scanning tunneling microscopy (STM). The high-resolution STM images demonstrate the difference between the supramolecular assembly structures of three liquid crystal molecules, which attribute to the hydrogen bonding interaction and π-π stacking interaction between different functional groups. The density functional theory (DFT) results also confirm the influence of these functional groups on the self-assemblies. The effort on the self-assembly of liquid crystal molecules at interface could enhance the understanding of the supramolecular assembly mechanism and benefit the further application of liquid crystals.
Fluorenone-based organic gel molecule and preparation method and application thereof
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Paragraph 0136; 0148-0152; 0183; 0195-0200;, (2019/04/06)
The invention belongs to the technical field of gel materials and provides a fluorenone-based organic gel molecule and a preparation method and application thereof. A fluorescent sensing film preparedfrom the fluorenone-based organic gel molecules can be
Supramolecular Gel Phase Controlled [4 + 2] Diels-Alder Photocycloaddition for Electroplex Mediated White Electroluminescence
Das, Satyajit,Okamura, Naoki,Yagi, Shigeyuki,Ajayaghosh, Ayyappanpillai
supporting information, p. 5635 - 5639 (2019/04/26)
Diels-Alder photocycloaddition of 9-phenylethynylanthracene results in multiple [4 + 2] and [4 + 4] cycloaddition products in solution, which can be controlled to form specific products under a restricted environment. We have exploited the gel phase of a
Influence of Ester versus Amide Linkers on the Supramolecular Polymerization Mechanisms of Planar BODIPY Dyes
R?dle, Alexander,Ritschel, Benedikt,Mück-Lichtenfeld, Christian,Stepanenko, Vladimir,Fernández, Gustavo
, p. 15772 - 15777 (2016/10/24)
We report the H-type supramolecular polymerization of two new hydrophobic BODIPY derivatives equipped with ester and amide linkages. Whereas the ester-containing BODIPY derivative undergoes an isodesmic supramolecular polymerization in which the monomers are parallel-oriented, the replacement of the ester by amide groups leads to a highly cooperative self-assembly process into H-type aggregates with a rotational displacement of the dye molecules within the stack. The dye organization imposed by simultaneous π–π and hydrogen bonding interactions is the driving force for the cooperative supramolecular polymerization, whereas the absence of additional hydrogen bonds for the ester-containing moiety does not suffice to induce cooperative phenomena.
Hydrogen bonding directed supramolecular polymerisation of oligo(phenylene-ethynylene)s: Cooperative mechanism, core symmetry effect and chiral amplification
Wang, Feng,Gillissen, Martijn A. J.,Stals, Patrick J. M.,Palmans, Anja R. A.,Meijer, E. W.
, p. 11761 - 11770,10 (2012/12/12)
The design of supramolecular motifs with tuneable stability and adjustable supramolecular polymerisation mechanisms is of crucial importance to precisely control the properties of supramolecular assemblies. This report focuses on constructing π-conjugated oligo(phenylene ethynylene) (OPE)-based one-dimensional helical supramolecular polymers that show a cooperative growth mechanism. Thus, a novel set of discotic molecules comprising a rigid OPE core, three amide groups, and peripheral solubilising wedge groups featuring C 3 and C2 core symmetry was designed and synthesised. All of the discotic molecules are crystalline compounds and lack a columnar mesophase in the solid state. In dilute methylcyclohexane solution, one-dimensional supramolecular polymers are formed stabilised by threefold intermolecular hydrogen bonding and π-π interactions, as evidenced by 1H NMR measurements. Small-angle X-ray and light scattering measurements reveal significant size differences between the columnar aggregates of C3- and C2-symmetrical discotics, that is, the core symmetry strongly influences the nature of the supramolecular polymerisation process. Temperature-dependent CD measurements show a highly cooperative polymerisation process for the C3-symmetrical discotics. In contrast, the self-assembly of C2-symmetrical discotics shows a smaller enthalpy release upon aggregation and decreased cooperativity. In all cases, the peripheral stereogenic centres induce a preferred handedness in the columnar helical aggregates. Moreover, one stereogenic centre suffices to fully bias the helicity in the C2-symmetrical discotics. Finally, chiral amplification studies with the C3-symmetrical discotics were performed by mixing chiral and achiral discotics (sergeants-and-soldiers experiment) and discotics of opposite chirality (majority-rules experiment). The results demonstrate a very strong sergeants-and-soldiers effect and a rather weak majority-rules effect. Copyright
