01967nas a2200205   4500008004100000245015000041210006900191260000800260300001400268490000600282520117400288100002001462700002001482700002101502700002801523700003001551700003001581700002501611856012501636       2016                        eng d00aAlkyl-chain-separated triphenybenzene - carbazole conjugates and their derived polymers: candidates for sensory, electrical and optical materials0 aAlkylchainseparated triphenybenzene carbazole conjugates and the  cDEC  a6649-66570 v13 aFour new triphenylbenzene based carbazoles (THPBCz4, THPBCz6, THPBCz8 and THPBCz10) and polycarbazoles (polyTHPBCz4, polyTHPBCz6, polyTHPBCz8 and polyTHPBCz10), have been synthesized. Photoluminescence spectra of the monomers in dichloromethane exhibit two intense bands at 353 and 369 nm. Two additional bands (410 and 435 nm) are also observed due to intermolecular interactions. These bands are more intense in the case of thin films, indicating stronger pp stacking interactions in the solid state. Due to the extended p-conjugation, the polycarbazoles display two main emission bands (495 and 520 nm) which are red shifted as compared to the monocarbazoles. Due to the presence of emissive platforms such as triarylbenzene and carbazole, both monomers and polymers, function as efficient sensors for the detection of polynitroaromatic analytes (PA, DNT, rho-DNB and m-DNB). The electrochemically polymerized carbazole derivatives showed maximum capacitance of 41 F/g for polyTHPBCz6. The SCLC measurement reveals a maximum mobility of 6 x 10(-6) cm(2)/Vs for polyTHPBCz4 that showed better packing due to flexible alkyl chains that connect the conjugated moieties.1 aKaleeswaran, D.1 aVishnoi, Pratap1 aKumar, Subramani1 aChithiravel, Sundaresan1 aWalawalkar, Mrinalini, G.1 aKrishnamoorthy, Kothandam1 aMurugavel, Ramaswamy  uhttps://library.ncl.res.in/content/alkyl-chain-separated-triphenybenzene-carbazole-conjugates-and-their-derived-polymers02285nas a2200313   4500008004100000022001400041245011700055210006900172260000900241300001400250490000600264520120100270653002701471653003101498653002701529653002801556653001901584653001901603100002001622700002901642700002101671700002601692700002101718700001801739700002801757700002501785700003001810856013101840       2020                        eng d  a2574-097000aNanoporous covalent organic framework embedded with Fe/Fe3O4 nanoparticles as air-stable low-density nanomagnets0 aNanoporous covalent organic framework embedded with FeFe3O4 nano  cSEP   a9088-90960 v33 a<p>Covalent organic frameworks (COFs) made of light atoms such as H, C, N, and O with a significant void-to-framework ratio are excellent low-density supports for nanoparticles (nPs). Their framework can be precoded with heteroatoms to ensure binding with metallic nanoclusters. With these advantages, if controlled amounts of magnetic nPs are anchored to them, they can yield low-density organic-inorganic nanomagnets. Their organic nature facilitates fusion with bulk materials such as paper/textile to enable bulk composites with well-dispersed low-density magnets, which have potential for defense and next-generation aviation applications. Herein, we have grown small Fe/Fe3O4 nPs (5-18 wt %) inside a COF. Interestingly, 300 mg of this organic-inorganic framework material (containing 50 mg of nPs) can lift a vial of similar to 15,000 mg (300 times heavier). Also, the hydrophobic COF wraps around the Fe/Fe3O4 nanocluster retaining its room-temperature magnetic character even after 1 year, while the naked nPs lose it within a few days because of air oxidation. Bulk composites with paper and polymers have been made using this low-density Fe-COF to demonstrate their processability.</p>10aair-stable nanomagnets10aCovalent organic framework10aFe/Fe3O4 nanoparticles10alow-density nanomagnets10amagnetic rayon10ananoporous COF1 aKushwaha, Rinku1 aKaleeswaran, Dhananjayan1 aHaldar, Sattwick1 aChakraborty, Debanjan1 aMullangi, Dinesh1 aBorah, Aditya1 aVinod, Chathakudath, P.1 aMurugavel, Ramaswamy1 aVaidhyanathan, Ramanathan  uhttps://library.ncl.res.in/content/nanoporous-covalent-organic-framework-embedded-fefe3o4-nanoparticles-air-stable-low-density