Full components recovery of organic matter and indium from discarded liquid crystal display panels

Mononuclear, hexanuclear and polymeric indium(iii) pyrazolido complexes; structural characterization, dynamic solution studies and luminescent properties

“…The corresponding H 3,5 and pipH + resonances of 8 appear at 8.07, 3.05 and 1.52 ppm, respectively. Unfortunately, the 1 Spectroscopic studies of complexes 10-13. The solid-state emission spectra of 10-13 normalized to 1.0 at the maximum wavelength are shown in Fig.…”

“…Indium is a geologically scarce metal, commonly used in green technology and modern electronics, mainly for ITO films of liquid crystal displays (LCD). 1 Indium has been employed as a stabilizer in non-ferrous metal alloys, 2 and the 111 In radioisotope finds use in palliative cancer treatment, showing significantly enhanced cytotoxicity and tumor growth inhibition. 3,4 Indium( iii ) is a medium-strength Lewis acid, forming bonds with both hard and soft Lewis bases.…”

“…Complexes of the form mer-[MX 3 ( pz*H) 3 ] where M = Cr, Fe, Rh, and Re, X = Cl and Br, have previously been reported by us and others, 7,[17][18][19][20] serving as starting materials for the synthesis of dinuclear and polynuclear complexes. [21][22][23] Herein we report the synthesis, crystal structure, and dynamic solution 1 H-NMR behaviour of the first series of six mononuclear In III -pyrazole complexes, further used for the synthesis of three hexanuclear indium pyrazolate complexes, and series of four indium pyrazolato polymers. To the best of our knowledge, only one relevant dinuclear indium complex, containing a chelating 1-(2-hydroxyethyl)-3,5-dimethylpyrazole has been reported to date.…”

Investigation of Structures, Stability, and Electronic and Magnetic Properties of InnSnnClusters Using Density‐Functional Theory

“…Recycling indium production mainly includes the acid solution replacement method, acid leaching–sulfidation precipitation method, extraction method, and pyrolysis. [ 20–23 ] Among them, the thermal reduction method reduces indium‐containing waste to obtain indium–tin alloy; then, the indium–tin alloy is separated by electrolysis or vacuum distillation. This method has a high reduction rate of indium and tin, a simple process flow, and minimal environmental impact, which are excellent for application prospects.…”

Indium Recycling from Waste Liquid Crystal Displays: Is It Possible?

“…Today, LCDs are used in televisions, laptops, desktops, and other devices. LCD screens have a short service life period, ranging from 3 to 5 years for personal computer monitors and 1 to 3 years for cell phones [5]. LCD screens are complex in composition and consist of glass (85-87%), polymer membrane (12.7-14%), and liquid crystals (0.12-0.14%).…”