02129nas a2200181   4500008004100000245012800041210006900169260000800238300001400246490000700260520143600267100001801703700002201721700002701743700001901770700003001789856012801819       2018                        eng d00aGeneric and scalable method for the preparation of monodispersed metal sulfide nanocrystals with tunable optical properties0 aGeneric and scalable method for the preparation of monodispersed  cMAY  a5788-57970 v343 a<p>A rational synthetic method that produces monodisperse and air-stable metal sulfide colloidal quantum dots (CQDs) in organic nonpolar solvents using octyl dithiocarbamic acid (C(8)DTCA) as a sulfur source, is reported. The fast decomposition of metal-C(8)DTCA complexes in presence of primary amines is exploited to achieve this purpose. This novel technique is generic and can be applied to prepare diverse CQDs, like CdS, MnS, ZnS, SnS, and In2S3, including more useful and in-demand PbS CQDs and plasmonic nanocrystals of Cu2S. Based on several control reactions, it is postulated that the reaction involves the in situ formation of a metal-C(8)DTCA complex, which then reacts in situ with oleylamine at slightly elevated temperature to decompose into metal sulfide CQDs at a controlled rate, leading to the formation of the materials with good optical characteristics. Controlled sulfur precursor's reactivity and stoichiometric reaction between C(8)DTCA and metal salts affords high conversion yield and large-scale production of monodisperse CQDs. Tunable and desired crystal size could be achieved by controlling the precursor reactivity by changing the reaction temperature and reagent ratios. Finally, the photovoltaic devices fabricated from PbS CQDs displayed a power conversion efficiency of 4.64% that is comparable with the reported values of devices prepared with PbS CQDs synthesized by the standard methods.</p>1 aBera, Abhijit1 aMandal, Debranjan1 aGoswami, Prasenjit, N.1 aRath, Arup, K.1 aPrasad, Bhagavatula L. V.  uhttps://library.ncl.res.in/content/generic-and-scalable-method-preparation-monodispersed-metal-sulfide-nanocrystals-tunable01776nas a2200253   4500008004100000245009800041210006900139260000900208490000700217520092400224653001401148653002501162653001501187653002301202100001801225700002101243700002501264700002901289700002201318700001701340700001901357700001901376856012701395       2025                        eng d00aGermylene mediated reductive C-C and C-N coupling of an isocyanide and its device application0 aGermylene mediated reductive CC and CN coupling of an isocyanide  cFEB 0 v643 a<p>
	We have demonstrated a unique reductive coupling of 4-iodophenyl isocyanide, facilitated by a perimidine-based N-heterocyclic germylene (NHGe), which yields a bis-spirogerma compound featuring simultaneous C-C and C-N bond formation. This reaction, which leads to the oxidation of germanium from +2 to +4, represents a significant departure from previously documented isocyanide-germylene interactions. The product exhibits extensive conjugation across its bicyclic C4Ge2N2 framework, conferring distinct photophysical properties, including prominent orange luminescence in both solution and solid states. The photophysical properties are supported by the TD-DFT calculations confirming an n -&gt;pi* transition. The potential application of this compound in optoelectronic devices, particularly as a hole transport layer in PbS quantum dot solar cells, is also explored, with promising preliminary results.</p>
10aGermylene10ahole transport layer10aIsocyanide10areductive coupling1 aGour, Kritika1 aPramanik, Debjit1 aDash, Soumya, Ranjan1 aShinde, Dipak, Dattatray1 aVenugopal, Geethu1 aVanka, Kumar1 aRath, Arup, K.1 aSen, Sakya, S.  uhttps://library.ncl.res.in/content/germylene-mediated-reductive-c-c-and-c-n-coupling-isocyanide-and-its-device-application