13037-87-1Relevant articles and documents
Bimodal Heterogeneous Functionality in Redox-Active Conjugated Microporous Polymer toward Electrocatalytic Oxygen Reduction and Photocatalytic Hydrogen Evolution
Singh, Ashish,Verma, Parul,Samanta, Debabrata,Singh, Tarandeep,Maji, Tapas Kumar
, p. 3810 - 3817 (2020)
The designing and development of heterogeneous catalysts for conversion of renewable energy to chemical energies by electrochemical as well as photochemical processes is at the forefront of energy research. In this work, two new donor–acceptor-based redox-active conjugated microporous polymers (CMPs) (TAPA-OPE-mix and TAPA-OPE-gly) are synthesized through Schiff base condensation reaction using a microwave synthesizer. Notably, the asymmetric and symmetric bola-amphiphilic nature of the OPE struts results in distinct nanostructuring and morphologies in the CMPs. Interestingly, both CMPs show impressive heterogeneous catalytic activity toward electrochemical O2 reduction and photocatalytic H2 evolution reactions, and therefore, act as bimodal electro- and photocatalytic porous organic materials. Furthermore, the redox-active property of the CMPs is exploited for in situ generation and stabilization of platinum nanoparticles (Pt), and these Pt@CMPs exhibit significantly enhanced photocatalytic activity.
Phase transition in cyclic organophosphazenes: The effect of side chains on mesomorphism
Moriya, Keiichi,Yamane, Toshihiro,Suzuki, Toshiya,Kajiwara, Meisetsu,Yano, Shinichi
, p. 787 - 794 (2001)
Mesogenicity of five cyclotriphosphazenes and two cyclotetraphosphazenes with a similar dodecyl or dodecyloxy end and different central hard groups was studied. In the four cyclotriphosphazenes except for a cyclotriphosphazene with phenyl derivative side chains, enantiotropic mesomorphic phases were observed. The order of the thermal stability in mesophase is phenylazobenzene > phenyliminomethylphenyl > biphenyl groups for the side chains. The cyclotetraphosphazenes with biphenyl and Schiff base derivatives have lower mesomorphic thermal stability than cyclotriphosphazenes with the same side groups.
Nonplanar Ladder-Type Polycyclic Conjugated Molecules: Structures and Solid-State Properties
Liu, Kuojin,Qiu, Feng,Yang, Chongqing,Tang, Ruizhi,Fu, Yubin,Han, Sheng,Zhuang, Xiaodong,Mai, Yiyong,Zhang, Fan,Feng, Xinliang
, p. 3332 - 3338 (2015)
Using an efficient intramolecular carbon-carbon cross-coupling reaction, a series of new ladder-type conjugated molecules have been prepared successfully in high yields. Such a pyran-fused polycylic structure possesses an extended π-conjugated backbone with flexible conformation, which gives these molecules interesting properties, including high solubility in common organic solvents, excellent thin film-forming abilities, blue fluorescent emission with good quantum yields, and aggregate formation in a binary solvent. The self-assembly behaviors of these molecules as well as various nanostructures can be finely tailored by varying the substituted group on the molecular periphery. The powder and single-crystal X-ray diffraction analyses revealed that the synergetic effect of π-π stacking and van der Waals interactions play a key role in controlling the morphologies of these aggregates. More importantly, self-assembled molecules exhibit good fluorescent performance, due to their twist backbone conformation. (Figure Presented).
New phosphorescent platinum(ii) complexes with tetradentate C*N^N*C ligands: liquid crystallinity and polarized emission
Zhang, Shilin,Luo, Kaijun,Geng, Hao,Ni, Hailiang,Wang, Haifeng,Li, Quan
, p. 899 - 906 (2017)
New phosphorescent, liquid crystalline cyclometalated tetradentate platinum complexes (Pt-L16, Pt-L12 and Pt-L6) based on the tetradentate C*N^N*C ligands (C*N^N*C = 6,6′-bis(4-(alkoxy)-phenoxy)-2,2′-bipyridine) are designed and synthesized. Their crystal structure, and photophysical, electrochemical and liquid crystal characteristics were investigated. The X-ray structure of Pt-L12 shows a severe distortion of this complex towards a tetrahedral geometry. All complexes are emissive both in degassed solution and in the solid state at room temperature with emission maxima in the red region of the spectrum. Pt-L16 and Pt-L12 show monotropic smectic liquid crystal characteristics. Moreover, these liquid crystal complexes can be aligned on a rubbed nylon-6 glass substrate and produce polarized emission with a dichroic ratio of 5.1.
Polymer Composition
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Paragraph 0221-0226, (2020/12/01)
Methods for forming a laminate are provided. The method provides a highly aligned block copolymer without orientation defects, coordination number defects distance defects and the like on a substrate, thereby providing a laminate which can be effectively
Compound and use thereof
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Paragraph 0056; 0057, (2019/05/22)
[A] a method of sufficiently exhibiting the monomolecular film. (1) A compound represented by the general formula [a] is. (1) A e B e C a-L(In the formula, and the A C, respectively, and/or heteroatom ring structure may be of straight-chain hydrocarbon gr
Photoswitchable J-aggregated processable organogel by integrating a photochromic acceptor
Samanta, Debabrata,Singh, Ashish,Verma, Parul,Bhattacharyya, Sohini,Roy, Syamantak,Maji, Tapas Kumar
supporting information, p. 10946 - 10952 (2019/09/30)
A novel αchromophoric 1,4-bis(anthracenylethynyl)benzene (BAB)-based highly emissive J-aggregated organogel has been synthesized and characterized. Single-crystal structure determination of asymmetric π-chromophoric bola-amphiphilic BAB1 (dodecyl and triethyleneglycolmonomethylether containing side chains of bis(anthracenylethynyl)benzene) supports J-aggregation. Further, a photochromic acceptor chromophore, 4,4′-(perfluorocyclopent-1-ene-1,2-diyl)bis(5-methylthiophene-2-carbaldehyde), is noncovalently encapsulated in the gel and photoswitching studies have been performed based on photochromic F?rster resonance energy transfer. The modulated emission of the processable soft material is further exploited for rewritable display. However, BAB2 (dodecyl side chain on both sides) does not show gelation property due to its low solubility.
Solvent Adaptive Dynamic Metal-Organic Soft Hybrid for Imaging and Biological Delivery
Samanta, Debabrata,Roy, Syamantak,Sasmal, Ranjan,Saha, Nilanjana Das,Pradeep,Viswanatha, Ranjani,Agasti, Sarit S.,Maji, Tapas Kumar
supporting information, p. 5008 - 5012 (2019/03/11)
A solvent responsive dynamic nanoscale metal-organic framework (NMOF) [Zn(1 a)(H2O)2] has been devised based on the self-assembly of ZnII and asymmetric bola-amphiphilic oligo-(p-phenyleneethynylene) (OPE) dicarboxylate linker 1 a having dodecyl and triethyleneglycolmonomethylether (TEG, polar) side chains. In THF solvent, NMOF showed nanovesicular morphology (NMOF-1) with surface decorated dodecyl chains. In water and methanol, NMOF exhibited inverse-nanovesicle (NMOF-2) and nanoscroll (NMOF-3) morphology, respectively, with surface projected TEG chains. The pre-formed NMOFs also unveiled reversible solvent responsive transformation of different morphologies. The flexible NMOF showed cyan emission and no cytotoxicity, allowing live cell imaging. Cisplatin (14.4 wt %) and doxorubicin (4.1 wt %) were encapsulated in NMOF-1 by non-covalent interactions and, in vitro and in vivo drug release was studied. The drug loaded NMOFs exhibited micromolar cytotoxicity.
Flavylium Salts: A Blooming Core for Bioinspired Ionic Liquid Crystals
Forschner, Robert,Knelles, Jakob,Bader, Korinna,Müller, Carsten,Frey, Wolfgang,K?hn, Andreas,Molard, Yann,Giesselmann, Frank,Laschat, Sabine
, p. 12966 - 12980 (2019/11/05)
Thermotropic ionic liquid crystals based on the flavylium scaffold have been synthesized and studied for their structure-properties relationship for the first time. The mesogens were probed by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD). Low numbers of alkoxy side chains resulted in smectic (SmA) and lamello-columnar (LamCol) phases, whereas higher substituted flavylium salts showed Colro as well as ordered and disordered columnar (Colho, Colhd) mesophases. Mesophase width ranged from 13 K to 220 K, giving access to room temperature liquid crystals. The optical properties of the synthesized compounds were probed towards absorption and emission properties. Strong absorption with maxima between 444 and 507 nm was observed, and some chromophores were highly emissive with quantum yields up to 99 %. Ultimately, mesogenic and dye properties were examined by temperature-dependent emissive experiments in the solid state.
Pure white light emission and charge transfer in organogels of symmetrical and unsymmetrical π-chromophoric oligo-: P -(phenyleneethynylene) bola-amphiphiles
Roy, Syamantak,Samanta, Debabrata,Kumar, Pramod,Maji, Tapas Kumar
, p. 275 - 278 (2018/01/12)
Two novel bola-amphiphilic oligo-p-(phenyleneethynylene) (OPE) dicarboxylates have been synthesized having non-polar and mixed-polar side chains. This led to gelation in both with vesicular morphology. Upon in situ loading of a suitable dye and redox-active molecule, pure white light emitting and charge transfer (CT)-gels, respectively, were realized.