01704nas a2200181 4500008004100000245012300041210006900164260000800233300001400241490000700255520098100262100001801243700003301261700003801294700003101332700003001363856012901393 2017 eng d00aCascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping0 aCascade energy transfer and tunable emission from nanosheet hybr cJUL a7072-70750 v533 aLight harvesting donor-acceptor assemblies are indispensable to efficiently tap photons. In an attempt to improve the light harvesting efficiency of an acceptor doped assembly, we design and synthesize a donor-acceptor-donor triad which exhibits an exceptional intramolecular energy transfer with excellent efficiency. Moreover, a facile cascade energy transfer (energy funnelling) is observed in the presence of a series of second acceptors (63-91% efficiency) with tunable emission colours. Self-assembled nanosheets formed by the triad in the presence of acceptors exhibit cascade energy transfer assisted tunable emission. In addition, use of chiral acceptors induces chirality to the triad and results in the formation of chiral nanosheets alongwith cascade energy transfer. Here chiral induction, nanosheet formation and cascade energy transfer in the presence of chiral acceptors are used as tools to probe the intercalation of acceptor molecules in the donor scaffold.1 aGoudappagouda1 aWakchaure, Vivek, Chandrakan1 aRanjeesh, Kayaramkodath, Chandran1 aAbhai, Chalona, Antony Ral1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/cascade-energy-transfer-and-tunable-emission-nanosheet-hybrids-locating-acceptor-molecules00986nas a2200193 4500008004100000022001400041245014700055210006900202260000900271300001400280490000700294520021000301100001800511700003300529700003800562700003100600700003000631856013100661 2019 eng d a1359-734500aCascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping (vol 53, pg 7072, 2017)0 aCascade energy transfer and tunable emission from nanosheet hybr cJUN  a6462-64620 v553 a

Correction for `Cascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping' by Goudappagouda et al., Chem. Commun., 2017, 53, 7072-7075.

1 aGoudappagouda1 aWakchaure, Vivek, Chandrakan1 aRanjeesh, Kayaramkodath, Chandran1 aAbhai, Chalona, Antony Ral1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/cascade-energy-transfer-and-tunable-emission-nanosheet-hybrids-locating-acceptor-molecules-002444nas a2200217 4500008004100000245009700041210006900138260000800207300001400215490000700229520166200236100003301898700000501931700001801936700003801954700002301992700002602015700003402041700003002075856012102105 2019 eng d00aCharge transfer liquid: a stable donor-acceptor interaction in the solvent-free liquid state0 aCharge transfer liquid a stable donoracceptor interaction in the cAUG a9371-93740 v553 a

Charge-transfer complexes have been an inspiration to develop many functional soft materials. However, most of those studies have focused on solution based assemblies wherein the explicit control of solvents and their polarity are crucial. In this context, we explore an efficient and stable charge transfer liquid using a solvent-free liquid dialkoxynaphthalene donor and a naphthalenediimide acceptor. It has been observed that irrespective of the donor-acceptor ratio, the charge-transfer liquid exhibited an unprecedented stability and retained characteristic features even at increased temperatures. The underlying intermolecular interactions leading to efficient CT have been examined by NMR techniques together with theoretical modelling studies. The concept of charge transfer liquid will be highly beneficial for the development of processable optoelectronically active materials.
 

1 aWakchaure, Vivek, Chandrakan1 a1 aGoudappagouda1 aRanjeesh, Kayaramkodath, Chandran1 aChakrabarty, Suman1 aRavindranathan, Sapna1 aRajamohanan, Pattuparambil, R1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/charge-transfer-liquid-stable-donor-acceptor-interaction-solvent-free-liquid-state02055nas a2200241 4500008004100000022001400041245009200055210006900147260000800216300001600224490000800240520121300248100003801461700002601499700002901525700001801554700003301572700001801605700001501623700002401638700003001662856012101692 2019 eng d a0002-786300aImidazole-linked crystalline two-dimensional polymer with ultrahigh proton-conductivity0 aImidazolelinked crystalline twodimensional polymer with ultrahig cSEP a14950-149540 v1413 a

Proton-exchange membrane fuel cells are promising energy devices for a sustainable future due to green features, high power density, and mild operating conditions. A facile proton-conducting membrane plays a pivotal role to boost the efficiency of fuel cells, and hence focused research in this area is highly desirable. Major issues associated with the successful example of Nafion resulted in the search for alternate proton conducting materials. Even though proton carrier loaded crystalline porous organic frameworks have been used for protonconduction, the weak host-guest interactions limited their practical use. Herein, we developed a crystalline 2D-polymer composed of benzimidazole units as the integral part, prepared by the condensation of aryl acid and diamine in polyphosphoric acid medium. The imidazole linked-2D-polymer exhibits ultrahigh proton conductivity (3.2 X 10(-2) S cm(-1)) (at 95% relative humidity and 95 degrees C) in the pristine state, which is highest among the undoped porous organic frameworks so far reported. The present strategy of a crystalline proton-conducting 2D-polymer will lead to the development of new high performing crystalline solid proton conductor.

1 aRanjeesh, Kayaramkodath, Chandran1 aIlathvalappil, Rajith1 aVeer, Sairam, Dnyaneshwa1 aPeter, Joseph1 aWakchaure, Vivek, Chandrakan1 aGoudappagouda1 aRaj, Vipin1 aKurungot, Sreekumar1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/imidazole-linked-crystalline-two-dimensional-polymer-ultrahigh-proton-conductivity01963nas a2200253 4500008004100000022001400041245011500055210006900170260000800239300001400247490000700261520109300268653001501361653001801376653001401394653001801408653002001426100003801446700001801484700002201502700002601524700003001550856012901580 2021 eng d a1867-388000aDurable metalloporphyrin 2D-polymer for photocatalytic hydrogen and oxygen evolution from river and sea waters0 aDurable metalloporphyrin 2Dpolymer for photocatalytic hydrogen a cAPR a1717-17210 v133 a

It is highly imaginary that the outcome of a combination of two complementary resources leads to answer an alarming global issue. One such possible example is the solar seawater splitting for `clean fuel' H-2 generation. Since the catalytic activity and stability of the photocatalysts are substantially challenged in seawater, the design of an efficient and stable photocatalyst is highly desirable. Herein, we demonstrate the solar seawater splitting by a two-dimensional polymer catalyst derived from metalloporphyrin bearing multi-hydroxyl groups. A bimetallic (Co and Ni) porphyrin 2D-polymer exhibits excellent long-term durability of 15 cycles of H-2 and O-2 generation in 200 days from pure water without a considerable decrease in efficiency. Detailed studies using river and seawaters also show the reliable performance of the catalyst over repeated cycles. Here the deactivation modes of catalytic activity have been nullified by the layered metalloporphyrin polymer structure through stable pi-pi stacking, signifying the molecular design of 2D-polymer photocatalyst.

10a2D-polymer10aPhotocatalyst10aporphyrin10aSelf-assembly10awater splitting1 aRanjeesh, Kayaramkodath, Chandran1 aGeorge, Leena1 aMaibam, Ashakiran1 aKrishnamurty, Sailaja1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/durable-metalloporphyrin-2d-polymer-photocatalytic-hydrogen-and-oxygen-evolution-river-and