Fluorene production from coke-industry byproducts

D’yakov, S. N.; Nevedrov, A. V.; Papin, A. V.

doi:10.3103/s1068364x12090025

Cited by 3 publications

(3 citation statements)

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“…A clear self-quenching of fluorescent emission was also observed while increasing the concentration of C 12 IFQA in solution, as a result of the intermolecular aggregation (see the Supporting Information). Solid-state UV−vis spectrum of C 12 IFQA was similar to that in concentrated nonpolar solvent ( Figure 3a), except that the spectrum was slightly further redshifted, indicating a complete H-bonded form and possible π−π stacking interaction in the thin film. These experimental results unambiguously confirmed the H-bonding ability of C 12 IFQA in solution and in the solid state.…”

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confidence: 73%

“…The H-bond-donating feature of the N–H group can therefore be retained. In terms of cost, the main starting material of IFQA (i.e., fluorene) is an inexpensive, mass-produced commodity chemical as a byproduct of the coke industry . Taking advantage of the good solubility and high regioselectivity of fluorene starting materials, we developed a cost-effective and environmentally benign synthetic route, “condensation followed by annulation”, for general construction of soluble quinacridone derivatives.…”

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confidence: 99%

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Solution-Processable Core-Extended Quinacridone Derivatives with Intact Hydrogen Bonds

et al. 2015

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A highly efficient and feasible "condensation followed by annulation" synthetic approach was developed to afford a subset of 9-ring-fused quinacridone derivatives on a 10 g scale. Despite the amenable intermolecular hydrogen-bonding ability of these rigid molecules, good solubility in common organic solvents and solution processability into uniformed thin films were achieved. Integrated advantages in the synthesis and properties make these compounds ideal building blocks for high-performance dyes and optoelectronic materials.

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confidence: 73%

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Solution-Processable Core-Extended Quinacridone Derivatives with Intact Hydrogen Bonds

et al. 2015

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“…For this reason, the processing of slag waste to produce building materials is proposed. The problem of disposal of ash and slag waste (10-15% of the processed coal input) produced by industrial solid-fuel boiler plants is quite relevant [13,14].…”

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confidence: 99%

Environmental Safety Management of a Coal Mining Enterprise

Golofastova¹,

Михайлов²,

Galanina³

2016

Proceedings of the 8th Russian-Chinese Symposium "Coal in the 21st Century: Mining, Processing, Safety"

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The purpose of the study is an analysis of the environmental safety performance at the local level (a coal mining enterprise) and proposals for improvement of the management decision support mechanism aimed at the environmental safety improving. The results of the study of theoretical and applied aspects of environmental safety management process in relation to coal producers are presented, the problems providing for the identification, the selection of the methods for the calculation and estimation of environmental safety indicators have been identified and solved. The basic strategies to ensure environmental safety of the enterprise depending on the existing environmental management system are considered. The analysis of the major ecological and economic indicators of a coal mining enterprise, which characterize the state of its environmental safety, is conducted. The main result of the study is the development of the proposals for improving the management decision-making support mechanism aimed at improvement of environmental safety of the coal enterprises, including technical-technological and business measures. The developed innovative proposals can be used to ensure the environmental safety at various coal mining enterprises.

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