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Arnab Dutta Manas Mahapatra MD Hussain Sanfui Narendra Nath Ghosh Pijush Kanti Chattopadhyay Nayan Ranjan Singha 《Advanced Optical Materials》2021,9(21):2100802
The development of intrinsically luminescent multifunctional macromolecules and understanding their fluorescence characteristics are highly desirable to broaden further the scope of nontraditional macromolecular luminogens. Here, two nontraditional macromolecular luminogens, such as 2-(methacryloyloxy)ethanol-co-2-hydroxyethyl 3-(N-(methylol)acrylamido)-2-methylpropanoate-co-N-(methylol)-2-propenamide (MAE-co-HENMAMMP-co-NMPA, ML1 ) and 2-methylenesuccinic acid-co-2-((N-(methylol)acrylamido)methyl)succinic acid-co-N-(methylol)-2-propenamide (MSA-co-NMAMMSA-co-NMPA, ML2 ) are synthesized via in situ inclusions of N-(methylol)acrylamido-ester and N-(methylol)acrylamido-acid comonomers by the polymerization of two synthetic monomers. These luminogens are suitable for sensing alongside exclusion of paramagnetic ions, i.e., Cu(II) and Fe(III). The structures of ML1 and ML2 , in situ protruded HENMAMMP/NMAMMSA, and aggregation-enhanced emissions (AEEs) are explored thoroughly. The through-space electronic interactions from n/π of HENMAMMP + NMPA and NMAMMSA + MSA fragments to π* of HENMAMMP + MAE and NMAMMSA in ML1 and ML2 , respectively, and hydrogen bonding among > C O N − of HENMAMMP and − CON H − of NMPA in ML1 and − C O OH/ − COO H of MSA and − COO H / − CH2 O H of NMAMMSA in ML2 collectively form clusteroluminogens, comprehended by reduced density gradient (RDG) calculations. The O-donor selective coordinative interactions of paramagnetic Cu(II) and Fe(III) and substantial adsorption from aqueous solutions (concentrated) are analyzed through X-ray photoelectron spectroscopy (XPS) spectra and density functional theory (DFT) studies of ML1 / ML2 and Cu(II)- ML1 /Fe(III)- ML2 . 相似文献
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Abstract Lac is the only known natural resin of animal origin. It is the secretion of a tiny insect known as Kerriar lacca (formally called Laceifer lacca). The lac-forming tiny insect grows on some types of trees, mostly abundant in tropical countries, including India. The secretion of the lac insect hardens in air and forms a covering on the body of the insect. This covering or the nest forms a continuous incrustation on the branches of the host trees. Lac is collected by scraping the incrustation from the branches of the trees. 相似文献
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The structure of an inorganic chiral medium represented as a stack of identical form-birefringent layers that twist steadily with increasing thickness is perturbed by realigning a fraction of each layer to a fixed direction. Experimental results show that the resulting chiral-birefringent composite medium exhibits Bragg resonance with elliptically polarized light, and simulations indicate that Bragg reflectors can be designed for any polarization including linear. 相似文献
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M. Ghoreishi A. I. B. MD. Ismail A. K. Alomari 《Mathematical Methods in the Applied Sciences》2011,34(15):1833-1842
This paper presents general framework for solving the nth‐order integro‐differential equation using homotopy analysis method (HAM) and optimal homotopy asymptotic method (OHAM). OHAM is parameter free and can provide better accuracy over the HAM at the same order of approximation. Furthermore, in OHAM the convergence region can be easily adjusted and controlled. Comparison, via two examples, between our solution using HAM and OHAM and the exact solution shows that the HAM and the OHAM are effective and accurate in solving the nth‐order integro‐differential equation. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献