@article {47742,
	title = {Organic-inorganic perovskitoid with zwitterion cysteamine linker and its crystal-crystal transformation to ruddlesden-popper phase},
	journal = {Angewandte Chemie-International Edition},
	volume = {60},
	year = {2021},
	month = {AUG },
	pages = {18750-18760},
	type = {Article},
	abstract = {We demonstrate synthesis of a new low-D hybrid perovskitoid (a perovskite-like hybrid halide structure, yellow crystals, P21/n space group) using zwitterion cysteamine (2-aminoethanethiol) linker, and its remarkable molecular diffusion-controlled crystal-to-crystal transformation to Ruddlesden-Popper phase (Red crystals, Pnma space group). Our stable intermediate perovskitoid distinctly differs from all previous reports by way of a unique staggered arrangement of holes in the puckered 2D configuration with a face-sharing connection between the corrugated-1D double chains. The PL intensity for the yellow phase is 5 orders higher as compared to the red phase and the corresponding average lifetime is also fairly long (143 ns). First principles DFT calculations conform very well with the experimental band gap data. We demonstrate applicability of the new perovskitoid yellow phase as an excellent active layer in a self-powered photodetector and for selective detection of Ni2+ via On-Off-On photoluminescence (PL) based on its composite with few-layer black phosphorous.},
	keywords = {Crystal growth, organic-inorganic hybrid composites, perovskite phases, photodetectors, zwitterions},
	issn = {1433-7851},
	doi = {10.1002/anie.202105918},
	author = {Kour, Prachi and Reddy, Mallu Chenna and Pal, Shiv and Sidhik, Siraj and Das, Tisita and Pandey, Padmini and Mukherjee, Shatabdi Porel and Chakraborty, Sudip and Mohite, Aditya D. and Ogale, Satishchandra}
}
@article {49765,
	title = {One-step microwave-assisted synthesis of a MoO3-x-covalent organic framework (COF)-based nanocomposite for amplified surface-enhanced Raman spectroscopy in environmental applications},
	journal = {Nanoscale},
	volume = {18},
	year = {2026},
	month = {JAN },
	type = {Article},
	abstract = {<p>
	This study introduces a novel one-step microwave-assisted (MW-AT) synthesis strategy for a TpTTA COF and demonstrates the fabrication of a MoO3-x-TpTTA COF-based nanocomposite (NC) for the first time. This method significantly reduces synthesis time (similar to 1 h) while achieving a high yield at a moderate temperature (120 degrees C). In contrast, traditional solution-based COF synthesis methods may take several days with continuous heating at higher temperatures (\&lt;= 200 degrees C). The as-synthesized MoO3-x-COF-based NC was shown to serve as an affordable and straightforward substrate for surface-enhanced Raman scattering (SERS) detection of an organic dye, such as methylene blue (MB), achieving a maximum enhancement factor (EF) of 7.76 x 104. The incorporation of MoO3-x into the COF provides several advantages, including plasmonic enhancement by nonstoichiometric transition metal oxide (TMO) without requiring the addition of noble nanocrystals (e.g., Ag, Au, etc.), improved stability of the SERS substrate, comparable SERS sensitivity, and reduced costs. Furthermore, the as-synthesized MoO3-x-TpTTA COF-based SERS substrate demonstrated exceptional detection capabilities with high reproducibility, achieving a limit of detection (LOD) as low as 12.5 ppm for Mancozeb (Mz), a common commercially used dithiocarbamate insecticide used on various vegetables, fruits, nuts, and field crops. Notably, Mz is classified as a category III carcinogen by the International Agency for Research on Cancer. This highlights the potential for developing TMO-COF-based NCs for next-generation SERS-based applications in environmental and food safety monitoring.</p>
},
	issn = {2040-3364},
	doi = {10.1039/d5nr02849c},
	author = {Patil, Manoj Krishnat and Wagh, Premjeet Gangadhar and Mukherjee, Shatabdi Porel}
}
