02993nas a2200241   4500008004100000022001400041245012700055210006900182260011000251300001400361490000600375520203600381100003102417700001902448700002502467700002002492700001702512700003102529700001902560700002402579700002002603856012802623       2016                        eng d  a2046-206900aSolution chemistry-based nano-structuring of copper dendrites for efficient use in catalysis and superhydrophobic surfaces0 aSolution chemistrybased nanostructuring of copper dendrites for   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a8416-84300 v63 a<p>Despite their performance and economic advantages over Ag and Au, there have been no focused research efforts on the nano-structuring of Cu dendrites with respect to fine-tuning their structure/morphology towards the efficiency enhancement of suitable applications. Reported here is a simple, versatile, environmentally-friendly and galvanic replacement reaction-based solution chemistry methodology to synthesize highly nano-structured copper dendrites targeted towards the efficiency enhancement of desired applications. Herein, copper is deposited galvanically on an Al foil in the presence of NaCl/HCl, wherein the chloride anions augment an uninterrupted replacement reaction. The growth process of Cu dendrites has been probed in detail. The presence of acid, the type of Cu2+ precursor salt, the Cu2+ ion concentration, the surfactant concentration and the reaction temperature are all demonstrated to provide useful means of modulating the surface structure/morphology of the dendrites. Notably, dendrites formed in the presence of acid are found to be highly nano-structured. Moreover, it is also found that the morphology/structure of the obtained Cu deposit depends considerably upon the choice of the Cu2+ precursor salt, a parameter that has been completely overlooked in the past. The acid-induced nano-structuring of the dendrites is exploited for enhancing their efficiency in the catalytic reduction of para-nitrophenol and for fabricating self-cleaning superhydrophobic surfaces. These nano-structured dendrites are demonstrated to have the highest ever normalized rate constant for the catalytic reduction reaction. Superhydrophobic surfaces fabricated using these dendrites demonstrate excellent self-cleaning abilities, showing a high contact angle (159 degrees) with low contact angle hysteresis (2 degrees). This facile synthetic strategy for the fabrication of highly nano-structured Cu dendrites is expected to open up avenues for the production of Cu-based low-cost functional nano/micro-materials.</p>1 aBakthavatsalam, Rangarajan1 aGhosh, Subrata1 aBiswas, Ratul, Kumar1 aSaxena, Aayushi1 aRaja, Alagar1 aThotiyl, Musthafa, Ottakam1 aWadhai, Sandip1 aBanpurkar, Arun, G.1 aKundu, Janardan  uhttps://library.ncl.res.in/content/solution-chemistry-based-nano-structuring-copper-dendrites-efficient-use-catalysis-and-002063nas a2200241   4500008004100000022001400041245013000055210006900185260000900254300001600263490000700279520120900286100002701495700003101522700001801553700002201571700002201593700002401615700001801639700001801657700002001675856012601695       2018                        eng d  a0020-166900aSynthetic control on structure/dimensionality and photophysical properties of low dimensional organic lead bromide perovskite0 aSynthetic control on structuredimensionality and photophysical p  cOCT   a13443-134520 v573 aLow dimensional lead halide perovskites have attracted huge research interest due to their structural diversity and remarkable photophysical properties. The ability to controllably change dimensionality/structure of perovskites remains highly challenging. Here, we report synthetic control on structure/dimensionality of ethylenediammonium (ED) lead bromide perovskite from a two dimensionally networked (2DN) sheet to a one dimensionally networked (1DN) chain structure. Intercalation of solvent molecules into the perovskite plays a crucial role in directing the final dimensionality/structure. This change in dimensionality reflects strongly in the observed differences in photophysical properties. Upon UV excitation, the 1DN structure emits white light due to easily formed “self-trapped” excitons. 2DN perovskites show band edge blue emission (∼410 nm). Interestingly, Mn2+ incorporated 2DN perovskites show a highly red-shifted Mn2+ emission peak at ∼670 nm. Such a long wavelength Mn2+ emission peak is unprecedented in the perovskite family. This report highlights the synthetic ability to control the dimensionality/structure of perovskite and consequently its photophysical properties.1 aHaris, Muhammed, P. U.1 aBakthavatsalam, Rangarajan1 aShaikh, Samir1 aKore, Bhushan, P.1 aMoghe, Dhanashree1 aGonnade, Rajesh, G.1 aSarma, D., D.1 aKabra, Dinesh1 aKundu, Janardan  uhttps://library.ncl.res.in/content/synthetic-control-structuredimensionality-and-photophysical-properties-low-dimensional02784nas a2200289   4500008004100000022001400041245016800055210006900223260000900292300001200301490000700313520176900320100001902089700003102108700001802139700001602157700002402173700002002197700002102217700002002238700002702258700002402285700002402309700001902333700002002352856012202372       2021                        eng d  a2050-752600aSynergistic electronic coupling/cross-talk between the isolated metal halide units of zero dimensional heterometallic (Sb, Mn) halide hybrid with enhanced emission0 aSynergistic electronic couplingcrosstalk between the isolated me  cDEC   a360-3700 v103 aHeterometallic 0D metal halide hybrids, consisting of more than one kind of metal halide units, are anticipated to manifest synergistic effects on the photo-physical properties of the constituent metal halide units. Such architectures hold great promise for design and development of function-targeted materials. However, heterometallic 0D hybrids, featuring isolated metal halide units, typically do not show any synergistic effects due to large inter-unit spatial separations that inhibit interactions/coupling between the constituent metal halide units. It remains challenging to design synthetic strategies that would support structural modifications to allow synergistic electronic coupling between the metal halide units in heterometallic 0D hybrids. Here, we report synthesis and characterization of heterometallic (Sb, Mn) 0D hybrid, namely Tris SbMnCl, with isolated MnCl5 units, (Sb/Mn)Cl-6 units, dispersed in the organic ligand matrix and layer of dynamic and networked water molecules. Steady state and time resolved emission spectra (TRES) analysis suggests strong synergistic interaction between the isolated metal halide units. Efficient energy transfer from the strongly absorbing Sb centres to emissive Mn centres results in the observed enhanced emission. Proton conductivity measurements together with first-principles calculations suggest the unique role of the networked water molecules in mediating the electronic coupling/energy transfer between the separated metal halide units in Tris SbMnCl hybrid. This report highlights the role of structure/composition of the synthesized heterometallic 0D hybrid in attaining electronic dimensionality higher than 0D through synergistic electronic interaction between the isolated metal halide units.1 aBiswas, Anupam1 aBakthavatsalam, Rangarajan1 aDas, Deep, K.1 aSam, Jisvin1 aMali, Bhupendra, P.1 aBiswas, Chinmoy1 aMaana, Narugopal1 aThomson, Stuart1 aRaavi, Sai, Santosh Ku1 aKurungot, Sreekumar1 aGonnade, Rajesh, G.1 aDutta, Sudipta1 aKundu, Janardan  uhttps://library.ncl.res.in/content/synergistic-electronic-couplingcross-talk-between-isolated-metal-halide-units-zero02145nas a2200277   4500008004100000022001400041245008300055210006900138260000800207300001400215490000700229520124200236100002101478700003301499700002301532700002301555700002301578700001901601700001901620700002401639700002801663700002401691700001701715700002001732856011501752       2025                        eng d  a1948-718500aSupercooled liquid phases of luminescent zero dimensional metal halide hybrids0 aSupercooled liquid phases of luminescent zero dimensional metal   cSEP  a9391-94000 v163 a<p>
	Chemical design of metal halide hybrids (MHHs) with suppressed melting point (T-m) allows access to glassy phases from their liquid-melts. Thermal phase change (crystal-melt-glass) properties of glassy MHHs (with glass transition temperature T-g &gt; room temperature) have been exploited for device applications. However, room temperature stable supercooled liquid (SCL) MHHs (with T-g &lt; room temperature), originating from glass-SCL phase change, remain inaccessible. Here, a molecular design strategy is reported to access ambient stable, melt-processable, SCL multimetallic bromide hybrids (Mn2+,Cd2+; Mn2+,Zn2+; Benzyltributylammonium) with low T-g (15-16 degrees C), low T-m (90-100 degrees C), green luminescence, and high optical transparency. Structural, optical, thermal, and computational analyses highlight chemical design principles and support dopant (Mn2+) based luminescence. Rheological measurements confirm the SCL phase that shows thermal hysteresis and estimate relaxation time scales. This work provides a new material platform showcasing enhanced melt-processability for fabrication of moldable devices, unravelling chemical makeup-property correlation and expanding the material phase types of MHHs.</p>
1 aDas, Deep, Kumar1 aMarayathungal, Jumana, Hasin1 aPalakkolil, Athira1 aSarma, Dhritismita1 aKhan, Akram, Aadil1 aKumar, Praveen1 aKudlu, Ashwath1 aChoudhary, Mahendra1 aHathwar, Venkatesha, R.1 aPujala, Ravi, Kumar1 aMahata, Arup1 aKundu, Janardan  uhttps://library.ncl.res.in/content/supercooled-liquid-phases-luminescent-zero-dimensional-metal-halide-hybrids