01665nas a2200217   4500008004100000022001400041245011800055210006900173260011000242300001200352490000700364520079600371100002501167700002101192700001701213700002501230700001801255700002701273700002201300856012501322       2012                        eng d  a0959-942800aTuning spectral properties of phenothiazine based donor-pi-acceptor dyes for efficient dye-sensitized solar cells0 aTuning spectral properties of phenothiazine based donorpiaccepto  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV  a889-8940 v223 a<p>Two novel metal-free organic donor-pi-acceptor dyes were synthesized using electron-rich 10-butyl-(2-methylthio)-10H-phenothiazine as a donor and cyanoacrylic acid as an acceptor. The spectral response of the dye was tuned by introducing a vinylene thiophene pi-bridge. Obtained optical and electrochemical properties of the dyes seemed to be promising in terms of employing them as light harvesters in dye-sensitized solar cells (DSCs). The efficiencies of the devices under standard AM 1.5G (100 mW cm(-2)) conditions reached 7.3% with volatile electrolyte. The differences in the photovoltaic parameters of these DSCs were explained by comparing the results of electrochemical impedance spectroscopy (EIS) measurements and transient photovoltage and photocurrent decay experiments.</p>1 aMarszalek, Magdalena1 aNagane, Satyawan1 aIchake, Amol1 aHumphry-Baker, Robin1 aPaul, Vincent1 aZakeeruddin, Shaik, M.1 aGraetzel, Michael  uhttps://library.ncl.res.in/content/tuning-spectral-properties-phenothiazine-based-donor-pi-acceptor-dyes-efficient-dye-001819nas a2200229   4500008004100000022001400041245011000055210006900165260011000234300001200344490000700356520091600363100002601279700002201305700002601327700002001353700001901373700002101392700002101413700002501434856013001459       2013                        eng d  a1463-926200aFluorescent sophorolipid molecular assembly and its magnetic nanoparticle loading: a pulsed laser process0 aFluorescent sophorolipid molecular assembly and its magnetic nan  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a943-9530 v153 a<p>We report realization of strong green fluorescence in a fully biocompatible highly spherical mesoscale molecular assembly of sophorolipid created by pulsed UV laser processing of a water-based dispersion of sophorolipid. Remarkably, the said fluorescence is totally absent in the original molecule of sophorolipid and is thus the property of the pulsed laser induced modifications in the molecule and the assembly. We have separately examined the consequences of laser irradiation for glucose and oleic acid components which form the sophorolipid. This fluorescence character appears to be driven by the oleic acid component while the assembly process is assisted by the glucose component. Importantly the laser synthesized mesostructures can be easily redispersed in an aqueous medium after being dried and can also be loaded with magnetic nanoparticles (magnetite) for inducing the hyperthermia effect.</p>1 aSingh, Pradeep, Kumar1 aMukherji, Ruchira1 aJoshi-Navare, Kasturi1 aBanerjee, Abhik1 aGokhale, Rohan1 aNagane, Satyawan1 aPrabhune, Asmita1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/fluorescent-sophorolipid-molecular-assembly-and-its-magnetic-nanoparticle-loading-pulsed-001988nas a2200217   4500008004100000022001400041245011300055210006900168260011000237300001400347490000600361520112000367100002501487700002101512700001701533700002501550700001801575700002701593700002101620856012901641       2013                        eng d  a2046-206900aStructural variations of D-pi-A dyes influence on the photovoltaic performance of dye-sensitized solar cells0 aStructural variations of DpiA dyes influence on the photovoltaic  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAR  a7921-79270 v33 a<p>Two new organic D-pi-A dyes containing identical pi-conjugated spacer and anchoring/acceptor moieties but different donor groups were designed and synthesized. These dyes containing didodecylcyclopentadithiophene (CPDT) as a spacer, cyanoacrylic acid as an acceptor and N-butyl-carbazole or N-butyl-phenothiazine moieties as electron donor groups are labelled as V4 and V11 dyes, respectively. The variation in the donor group of these two dyes, that influences the photophysical, electrochemical and photovoltaic parameters, was investigated. The highest photovoltaic conversion efficiency of 7.5% was obtained with V4 dye at AM 1.5 G full sunlight intensity (100 mWcm(-2)). Comparison of phenothiazine donor dyes with two different pi-conjugated spacers, CPDT (V11) and vinyl thiophene (V7) containing devices shows that the V-oc of V7 dye is lower than that of V11 due to the downward shift of the conduction band edge. Transient photovoltage and electrochemical impedance spectroscopy measurements were performed to explain the differences in the PV parameters by varying the donors and/or spacer groups.</p>1 aMarszalek, Magdalena1 aNagane, Satyawan1 aIchake, Amol1 aHumphry-Baker, Robin1 aPaul, Vincent1 aZakeeruddin, Shaik, M.1 aGratzel, Michael  uhttps://library.ncl.res.in/content/structural-variations-d-pi-dyes-influence-photovoltaic-performance-dye-sensitized-solar-001031nas a2200193   4500008004100000022001400041245007200055210006400127260011000191300001400301490000700315520030200322100002100624700002300645700002000668700002200688700002500710856010200735       2014                        eng d  a1359-734500aCH3NH3PbI(3-x)(BF4)(x): molecular ion substituted hybrid perovskite0 aCH3NH3PbI3xBF4x molecular ion substituted hybrid perovskite  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP  a9741-97440 v503 a<p>A molecular ion (BF4-) substituted hybrid perovskite CH3NH3PbI(3-x)(BF4)(x) is synthesized. The substituted perovskite shows significant enhancement in electrical conductivity at low frequencies and improved photoresponse under AM1.5 illumination as compared to the perovskite (CH3NH3PbI3).</p>1 aNagane, Satyawan1 aBansode, Umesh, P.1 aGame, Onkar, S.1 aChhatre, Shraddha1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/ch3nh3pbi3-xbf4x-molecular-ion-substituted-hybrid-perovskite-001896nas a2200265   4500008004100000022001400041245012500055210006900180260010600249300001200355490000800367520090000375653001001275653002201285653001601307653001901323100002201342700002401364700002101388700001901409700002701428700002501455700002401480856012601504       2014                        eng d  a0013-468600aIndanthrone derived disordered graphitic carbon as promising insertion anode for sodium ion battery with long cycle life0 aIndanthrone derived disordered graphitic carbon as promising ins  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcNOV  a218-2230 v1463 a<p>We report facile, one step synthesis of disordered graphitic carbon by high temperature (1000 degrees C) pyrolysis of indanthrone dye (ID). The pyrolysed carbon is disordered in nature and the same is clearly evidenced by various analytical techniques like X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy. Na-insertion properties of such indanthrone dye derived disordered graphitic carbon (IDDGC) is evaluated in half-cell assembly (Na/IDDGC). The test cell delivered a reversible capacity of similar to 160 mAh g(-1) at current density of 25 mAg 1. In addition, excellent cycling profiles are noted for such IDDGC, which retains 67% of initial reversible capacity after 500 cycles. The present study clearly highlights the importance of disorder in the graphitic carbon for efficient Na-ion storage. (C) 2014 Elsevier Ltd. All rights reserved.</p>10aanode10adisordered carbon10aindanthrone10aNa-ion battery1 aSuryawanshi, Anil1 aMhamane, Dattakumar1 aNagane, Satyawan1 aPatil, Shankar1 aAravindan, Vanchiappan1 aOgale, Satishchandra1 aSrinivasan, Madhavi  uhttps://library.ncl.res.in/content/indanthrone-derived-disordered-graphitic-carbon-promising-insertion-anode-sodium-ion-001323nas a2200145   4500008004100000245013200041210006900173260000800242300001400250490000600264520072600270100002100996700002901017856013101046       2016                        eng d00aCH3NH3Pb(BF4)(3) and (C4H9NH3)2Pb(BF4)(4) family of 3D and 2D perovskites without and with iodide and bromide ions substitution0 aCH3NH3PbBF43 and C4H9NH32PbBF44 family of 3D and 2D perovskites   cNOV  a4757-47620 v73 aWe report the synthesis of fully molecular ion (BF4 )-based organicinorganic hybrid perovskite CH3NH3Pb(BF4)(3), which is a wide band gap semiconductor, and the same can be easily tuned toward the visible by the incorporation of bromide or iodide ions in the crystal framework simply by changing lead precursors. We have also successfully transformed the distorted 3D molecular-ion-induced perovskite to 2D (C4H9NH3)(2)Pb(BF4)(4), (C4H9NH3)(2)PbBr(4x)(BF4)(x), and (C4H9NH3)(2)PbI(4x)(BF4)(x) perovskites that exhibit the optical absorption over the UV to visible region. The thin films of molecular-ion-containing 2D perovskites with Br and I anions show blue and green luminescence, respectively, under UV illumination.1 aNagane, Satyawan1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/ch3nh3pbbf43-and-c4h9nh32pbbf44-family-3d-and-2d-perovskites-without-and-iodide-and-bromide01849nas a2200313   4500008004100000022001400041245012200055210006900177260007100246300001200317490000600329520075600335653002901091653003501120653001901155653001701174653001501191653001501206653001701221100002001238700002101258700001901279700002101298700002201319700001901341700002301360700002501383856012701408       2016                        eng d  a1944-824400aHybrid perovskite quantum nanostructures synthesized by electrospray antisolvent-solvent extraction and intercalation0 aHybrid perovskite quantum nanostructures synthesized by electros  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJAN  a854-8610 v83 a<p>Perovskites based on organometal lead halides have attracted great deal of scientific attention recently in the context of solar cells and optoelectronic devices due to their unique and tunable electronic and optical properties. Herein, we show that the use of electrospray technique in conjunction with the antisolventsolvent extraction leads to novel low-dimensional quantum structures (especially 2-D nanosheets) of CH3NH3PbI3- and CH3NH3PbBr3-based layered perovskites with unusual luminescence properties. We also show that the optical bandgaps and emission characteristics of these colloidal nanomaterials can be tuned over a broad range of visible spectral region by compositional tailoring of mixed-halide (I- and Br-based) perovskites.</p>10a2D nanostructure systems10aantisolvent-solvent extraction10abandgap tuning10aelectrospray10ananosheets10aperovskite10aquantum dots1 aNaphade, Rounak1 aNagane, Satyawan1 aShanker, Shiva1 aFernandes, Rohan1 aKothari, Dushyant1 aZhou, Yuanyuan1 aPadture, Nitin, P.1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/hybrid-perovskite-quantum-nanostructures-synthesized-electrospray-antisolvent-solvent-002279nas a2200361   4500008004100000022001400041245009100055210006900146260000800215490000600223520110800229653001501337653002901352653001601381653005301397653001901450653002401469653003501493653000701528653002601535653001601561100002401577700002701601700002101628700002101649700001801670700002201688700001701710700002301727700002301750700002501773856011901798       2017                        eng d  a2050-748800aLow-dimensional hybrid perovskites as high performance anodes for alkali-ion batteries0 aLowdimensional hybrid perovskites as high performance anodes for  cSEP0 v53 a<p><span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; background-color: rgb(248, 248, 248);">State-of-the-art Li (or Na) ion batteries work by insertion/extraction of the alkali metal ions into a porous electrode material, where the overall capacity is strongly dependent on the accessibility of the host material interior to the ions. On the other hand, the performance stability depends on various factors governed by the specific constitution of the electrode. Here we show that molecularly engineered low-dimensional hybrid perovskites can work as excellent anode materials for alkali-ion batteries. We measure a high reversible capacity of 646 mA h g(-1) at 100 mA g(-1) with good stability tested up to 250 cycles for the benzidine mediated lead iodide based 1D system. An ex situ analysis of the electrodes reveals that the storage primarily occurs via the Li-x(or Na-x)Pb alloying/de-alloying process. We anticipate that these results open a new direction for the use of low-dimensional hybrid perovskites for energy storage applications.</span></p>10aGeneration10aInorganic-Organic Hybrid10aLead Iodide10alithiation-intramolecular electrophilic reaction10aNa-Air Battery10aNegative Electrodes10aOrganometal Halide perovskites10aPB10aSequential Deposition10aSolar-cells1 aTathavadekar, Mukta1 aKrishnamurthy, Shrreya1 aBanerjee, Aparna1 aNagane, Satyawan1 aGawli, Yogesh1 aSuryawanshi, Anil1 aBhat, Suresh1 aPuthusseri, Dhanya1 aMohite, Aditya, D.1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/low-dimensional-hybrid-perovskites-high-performance-anodes-alkali-ion-batteries01830nas a2200205   4500008004100000245016600041210007000207260000800277300001200285490000700297520103000304100002101334700001701355700002001372700002201392700002401414700002501438700002801463856013301491       2017                        eng d00aPhenothiazine-based D-A-π-A dyes for highly efficient dye sensitized solar cells: effect of internal acceptor and non-conjugated π-spacer on device performance0 aPhenothiazinebased DAπA dyes for highly efficient dye sensitized  cFEB  a280-2860 v823 aThree new D-A-pi-A metal-free organic dyes based on phenothiazine as a donor (D) and non-conjugated pi-spacer were designed and synthesized. The incorporation of different 'internal acceptors' (electron traps) such as benzothiadiazole (BTD), benzotriazole (BTA), and pyridine were shown to allow systematic tuning of the energy levels and the photophysical properties. The AI-1 dye showed lower electronic disorder compared with the other two dyes. The efficiencies achieved with AI-1, AI-2, and AI-3 dyes were 8.5% (J(sc) = 15.42 mA cm(-2), V-oc = 0.78 V, FF = 68%), 7% (J(sc) = 12.8 mA cm(-2), V-oc = 0.78 V, FF = 68%) and 6.7% (J(sc) = 11.57 mA cm(-2), V-oc = 0.82 V, FF = 68.26 %), respectively. The incorporation of non-conjugated phenothiazine as a p-spacer in D-A-pi-A dyes showed remarkable enhancement in the photovoltaic performance of dye-sensitized solar cell (DSSC) devices. The sealed DSSC devices with iodide/tri-iodide (I-/I-3(-) @)based liquid electrolyte showed promising stability under ambient conditions.1 aNagane, Satyawan1 aIchake, Amol1 aAgrawal, Ishita1 aSadhanala, Aditya1 aFriend, Richard, H.1 aOgale, Satishchandra1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/phenothiazine-based-d-%CF%80-dyes-highly-efficient-dye-sensitized-solar-cells-effect-internal01468nas a2200193   4500008004100000245010200041210006900143260000800212300001400220490000700234520077400241100002001015700002101035700001901056700002401075700002201099700002501121856012801146       2017                        eng d00aSynthetic manipulation of hybrid perovskite systems in search of new and enhanced functionalities0 aSynthetic manipulation of hybrid perovskite systems in search of  cOCT  a3722-37390 v103 aOver the past few years the organic-inorganic hybrid perovskite systems have emerged as a promising class of materials for photovoltaic and electroluminescent thin-film device applications, in view of their unique set of tunable optoelectronic properties. Importantly, these materials can be easily solution-processed at low temperatures and as such are amenable to facile molecular engineering. Thus, a variety of low-dimensional forms and quantum structures of these materials can be obtained through strategic synthetic manipulations through small molecule incorporation or molecular ion doping. In this Minireview, we specifically focus on these approaches and outline the possibilities of utilizing these for enhanced functionalities and newer application domains.1 aNaphade, Rounak1 aNagane, Satyawan1 aBansode, Umesh1 aTathavadekar, Mukta1 aSadhanala, Aditya1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/synthetic-manipulation-hybrid-perovskite-systems-search-new-and-enhanced-functionalities