01911nas a2200181 4500008004100000022001400041245018500055210006900240260000900309300001200318490000700330520117100337100001801508700001801526700003001544700002701574856012801601 2018 eng d a1474-905X00aModulated photochemical reactivities of O-acetylated (3', 5'-dimethoxyphenyl) heteroaryl acyloin derivatives under direct irradiation and photo-induced electron transfer conditions0 aModulated photochemical reactivities of Oacetylated 3 5dimethoxy cJUN  a835-8450 v173 a

3', 5'-Dimethoxybenzoin esters are important photoremovable protecting groups which form 2-phenylbenzofuran derivatives upon photo-release. We utilized a similar concept to test a photochemical method of installing a benzofuran moiety to the conjugated backbone by subjecting O-acetylated (3', 5'-dimethylphenyl) heteroaryl acyloin derivatives through direct photo irradiation and a photo-induced electron transfer reaction. These photochemical methods were explored for a variety of heteroaromatic substrates appended on the ketone part of the O-acetylated cross-acyloin derivatives. The furan, thiophene and bithiophene derivatives led to the expected cyclized (benzofuran capped) products but the derivatives with extended conjugation decomposed under direct irradiation. However, under irradiation in the presence of an electron donor such as triethylamine, the extended acyloin derivatives afforded both cyclized and deacetoxylated products. The semiconducting nature of the extended cyclized products was also explored and tested for solution-processed organic field effect transistors, providing a maximum hole mobility of 1.3 x 10(-6) cm(2) V-1 s(-1).

1 aBisht, Rajesh1 aSingh, Saumya1 aKrishnamoorthy, Kothandam1 aNithyanandhan, Jayaraj uhttps://library.ncl.res.in/content/modulated-photochemical-reactivities-o-acetylated-3-5-dimethoxyphenyl-heteroaryl-acyloin02030nas a2200253 4500008004100000022001400041245010900055210006900164260000800233490000600241520111800247653002201365653002701387653003101414653001701445653003201462100002701494700002401521700003401545700001801579700003001597700002701627856012201654 2023 eng d a2367-093200aModular TiO2-squaraine dyes/electrolyte interface for dye-sensitized solar cells with cobalt electrolyte0 aModular TiO2squaraine dyeselectrolyte interface for dyesensitize cAPR0 v73 a

Strategies to diminish both charge recombination and aggregation of dyes on the photoanode by functionalizing the sensitizer with alkyl groups is the best approach to achieve high dyesensitized solar cell (DSSC) efficiency. Development of such a photoanode with NIR-active dyes which is compatible with a cobalt electrolyte is important to enhance the photovoltaic performance. In this report, alkyl-group-wrapped donor-acceptor-donor (D-A-D) based unsymmetrical squaraine dyes have been used for DSSC device characterization with a cobalt electrolyte. Surface passivation of photoanode was varied systematically by the extent of functionalization with alkyl groups to avoid charge recombination. DSSC device performance of 5.92% was achieved for an alkyl-group-wrapped squaraine dye with a cobalt electrolyte. Hence, appending the alkyl groups on the donor unit of squaraine dyes helps passivating the photoanode, whereas introducing hydrophilic groups provides a leaky surface where oxidized electrolyte species reach the titanium-metal-oxide surface which promotes the charge recombination process.

10acounter-electrode10aDSSC device efficiency10aDye-sensitized solar cells10aElectrolytes10aunsymmetrical squaraine dye1 aSingh, Ambarish, Kumar1 aSudhakar, Vediappan1 aJavaregowda, Bharathkumar, H.1 aBisht, Rajesh1 aKrishnamoorthy, Kothandam1 aNithyanandhan, Jayaraj uhttps://library.ncl.res.in/content/modular-tio2-squaraine-dyeselectrolyte-interface-dye-sensitized-solar-cells-cobalt00967nas a2200265 4500008004100000022001400041245012000055210006900175260000900244490000700253653001900260653001900279653002400298653002800322653002300350100001600373700002800389700003400417700002800451700002500479700002000504700003000524700001900554856012800573 2024 eng d a1433-785100aMOFite: a high-density lithiophilic and scalable metal-organic framework anode for rechargeable lithium-ion battery0 aMOFite a highdensity lithiophilic and scalable metalorganic fram cOCT 0 v6310aconjugated MOF10aEnergy storage10alithium ion battery10aMetal-organic framework10ascalable synthesis1 aGaber, Safa1 aMohammed, Abdul, Khayum1 aJavaregowda, Bharathkumar, H.1 aMartinez, Jose, Ignacio1 aSanchez, Pilar, Pena1 aGandara, Felipe1 aKrishnamoorthy, Kothandam1 aShetty, Dinesh uhttps://library.ncl.res.in/content/mofite-high-density-lithiophilic-and-scalable-metal-organic-framework-anode-rechargeable02285nas a2200265 4500008004100000022001400041245008800055210006900143260000800212490000700220520133500227653003301562653001401595653001501609653003101624653003001655100003001685700003401715700002901749700003301778700003201811700002601843700003001869856012001899 2025 eng d a2192-650600aMechanochemical large-scale rapid synthesis of ultrapure sodium hexafluorophosphate0 aMechanochemical largescale rapid synthesis of ultrapure sodium h cJUL0 v903 a

Among the sodium battery electrolytes, sodium hexafluorophosphate (NaPF6) exhibits superior conductivity, anodic stability, and stable cathode electrolyte interface compared to other electrolytes. Therefore, the synthesis of pure NaPF6 through a simple process is very important. Usually, NaPF6 is synthesized using HF. In our approach, NaPF6 is synthesized by grinding dry ammonium hexafluorophosphate (NH4PF6) and sodium metal. Sodium injects an electron into the ammonium ion, which results in the formation of ammonia and hydrogen. The gram scale synthesis is completed in about 30 min. Purification of the product is not needed. The product purity is confirmed by various spectroscopic and electrochemical techniques. Usually, NaPF6 comprises NaF, HF, and solvents as impurities that affect the performance of SIBs. It has been confirmed that the NaPF6 synthesized by our mechanochemical approach in the absence of solvent is devoid of impurities despite the absence of product purification step. Furthermore, the synthesis of pure NaPF6 (250 g) is demonstrated using a grinder used as household item in cooking Indian pancakes, which costs about 300 USD. The duration of the synthesis of 250 g pure NaPF6 is 1 h. The purity of this sample is comparable to that of NaPF6 (5 g) synthesized using mortar and pestle.

10aammonium hexafluorophosphate10aBatteries10acarbonates10asodium hexafluorophosphate10asodium vanadium phosphate1 aSenthilkumaran, Marimuthu1 aJavaregowda, Bharathkumar, H.1 aRajendran, Prakash, Babu1 aBalasubramanian, Rajalakshmi1 aAjithkumar, Thalasseril, G.1 aRavindranathan, Sapna1 aKrishnamoorthy, Kothandam uhttps://library.ncl.res.in/content/mechanochemical-large-scale-rapid-synthesis-ultrapure-sodium-hexafluorophosphate02790nas a2200253 4500008004100000022001400041245013300055210006900188260000900257300001600266490000700282520188300289653002202172653002502194653001802219653002402237653002602261653001302287100002402300700002902324700002502353700003002378856012802408 2025 eng d a1944-824400aModulation of lithium ion transport and cycling stability using rigid and flexible urethane moieties on the backbone of polymers0 aModulation of lithium ion transport and cycling stability using  cNOV  a63784-637910 v173 a

Graphite is the anode of choice for lithium-ion batteries. Due to volume change and poor conductivity of inorganic materials, they do not show comparable performance to that of graphite. Conjugated polymers are attractive because of their modularity and ease of synthesis. Herein, we report three polymers based on diketopyrrolopyrrole (DPP) as the anode. In an energy device, stored charges are due to a diffusive and capacitive component. Increasing the capacitive component is a challenge in both organic and inorganic systems. In our polymers, we installed urethane moieties that increase the capacitive component. The excellent Li+ ion transporting urethane moiety is part of the polymer chain. The Li+ ion transport is also impacted by the packing of the polymer chain. Therefore, the DPP units and urethane moieties are connected with either an alkyl chain, phenyl or biphenyl. The polymers with either alkyl or phenyl spacers showed stable cycling stability over 4000 charge-discharge cycles. On the other hand, the specific capacity of the batteries comprising a polymer with biphenyl started decreasing after 500 charge-discharge cycles. This is due to the solubility of the polymer in the battery electrolyte. The polymer with a phenyl spacer showed a higher Li+ ion diffusion coefficient due to the space generated between the polymer chains. The X-ray photoelectron spectroscopy analysis showed that the Li+ ions are bound to carbonyls, indicating the role of urethane in the charge transport. The polymer with an alkyl spacer showed a very high specific capacity of 600 mAh/g (1500th cycle) at a current density of 0.2 A/g, which is much higher than the theoretical capacity of graphite (372 mAh/g). The charge storage in all these polymers is dominated by a capacitive component, with the highest metric of 81% shown by a polymer with an alkyl spacer.

10aCycling stability10adiketopyrrolopyrrole10ahigh capacity10alithium-ion battery10anon-conjugatedpolymer10aurethane1 aKargude, Radhakisan1 aRajendran, Prakash, Babu1 aKika, Sharmin, Percy1 aKrishnamoorthy, Kothandam uhttps://library.ncl.res.in/content/modulation-lithium-ion-transport-and-cycling-stability-using-rigid-and-flexible-urethane02600nas a2200217 4500008004100000022001400041245015500055210006900210260000800279300001600287490000700303520176900310100002802079700003102107700002502138700003002163700002102193700001902214700003002233856011902263 2026 eng d a2470-134300aMetal films from a single source and their application in nanoporous filtration synthesis, electromagnetic interference shielding, and electroadhesion0 aMetal films from a single source and their application in nanopo cMAR a14203-142110 v113 a

Electroless metal depositions are carried out by a series of reduction steps involving multiple metal ions to obtain a film on synthetic and natural substrates. Herein, we report the use of metal ions from a single element to deposit metal films on various substrates. In a typical metal deposition procedure, Pd2+ ions are anchored on a polycarbonate membrane with vertically aligned pores of 0.6 mu m, which was reduced to its nanoparticles by sodium borohydride. The Pd nanoparticle-modified membrane was then immersed in a Pd plating bath. The Pd2+ ions are reduced by the reducing agent present in the plating bath. The reaction is catalyzed by the Pd nanoparticles. The Pd-modified membrane with vertically aligned Pd tubes were used to convert p-nitrophenol to p-aminophenol, which is an important molecule in the production of acetaminophen. While filtering the reactants through the Pd tubes, due to increased collision between the reactants and the catalyst Pd tubes, 100% conversion is achieved within 5 min. On the contrary, the conversion is only 10% if the membrane is placed in a vessel comprising the reactants. Due to the versatile nature of the metal deposition procedure, nickel was deposited on cotton substrates by a similar procedure. The nickel film-coated cotton cloth showed an impressive electromagnetic shielding interference efficiency of -60 dB while the uncoated cotton cloth did not shield electromagnetic radiation. To demonstrate the versatility of the approach, Pd-coated synthetic polymeric substrates are used to electroadhere gels and gel-like substances. Nickel-coated substrates are not suitable for electroadhesion; hence, a conjugated polymer was deposited on the substrate to electroadhere gel-like substances.

1 aVeerasubash, Muthupandi1 aBirajdar, Sarika, Hanamant1 aKika, Sharmin, Percy1 aSenthilkumaran, Marimuthu1 aDeshpande, Karan1 aShevate, Rahul1 aKrishnamoorthy, Kothandam uhttps://library.ncl.res.in/content/metal-films-single-source-and-their-application-nanoporous-filtration-synthesis