Synthesis and reactions of hydroxylated stilbenes and their possible occurrence as chromophore precursor structures in lignin

Lonsky, Liselotte; Lonsky, Werner F. W.; Kratzl, K.; Falkehag, Ingemar

doi:10.1007/bf00906775

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…Model exper- Both the E form (4a) and the Z form (5a) of a stilbene of type (17 have been detected in a kraft pulping liquor (Gierer & Lindeberg, 1980). The steric assignments of (4a) and (5a) are primarily based on the synthetic methods used for their preparation (Nelson & Wallis, 1973;Lonsky et al, 1976). It is notable that the Z H NMR signal from one of the methoxyl groups in the acetate derivative (5b) is located at comparatively high field (6 3.45) .…”

Section: Commentmentioning

confidence: 99%

Investigation of Three Stilbene Derivatives by X-ray Crystallography and NMR Spectroscopy

Stomberg¹,

Li²,

Lundquist³

et al. 1998

Acta Crystallogr C

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Section: Commentmentioning

confidence: 99%

Investigation of Three Stilbene Derivatives by X-ray Crystallography and NMR Spectroscopy

Stomberg¹,

Li²,

Lundquist³

et al. 1998

Acta Crystallogr C

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“…The bleaching process of the pulp has attracted significant attention for reducing the release of chemical and energy waste to the environment. In a conventional bleaching process, chromophores such as lignin and its degradation products containing conjugated double bonds that are formed via oxidation during the pulping process [3][4][5][6] are degraded with chlorine reagents such as sodium hypochlorite and chlorine dioxide, resulting in the production of toxic chlorinated compounds [7].…”

Section: Introductionmentioning

confidence: 99%

Behavioural analysis of a nonionic detergent in the kraft pulp washing process using cryo-time-of-flight secondary ion mass spectrometry and cryo-scanning electron microscopy

et al. 2017

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“…A number of structures have been implicated as c_omophores in mechmcal and chemcal pulps, including: catechol-metal complexes [1][2][3][4], comferaldehyde [1,2,5], quinone methides [1], stable radicals [1] and quinones [1,2,4,[6][7][8][9]. Of the vinous possible chromophores, quinones have been suggested to be major contributors to the color of kraft lignin [6][7][8]10].…”

mentioning

confidence: 99%

Investigation of ortho- and para-Quinone Chromophores in Alkaline Extraction Stage Residual Lignins

Zawadzki¹,

Runge²,

Ragauskas³

1999

ACS Symposium Series

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The institute of Paper Science and Technology is a unique organization whose charitable, educational, and scientific purpose evolves from the singular relationship between the ,Institute and the pulp and paper industry which has existed since 1929. The purpose of the Institute is fulfilled through three missions, which are:• to provide high quality students with a multidisciplinary graduate educational experience which is of the highest standard of excellence recognized by the national academic community and which enables them to perform to their maximum potential in a society with a technological base; and• to sustain an international position of leadership in dynamic scientific research which is participated in by both students and faculty and which is focused on areas of significance to the pulp and paper industry; and• to contribute to the economic and technical well-being of the nation through innovative educational, informational, and technical services. ACCREDITATION The Institute of Paper Science and Technology is accredited by the Commission on Colleges of the Southern Association of Colleges and Schools to award the Master of Science and Doctor of Philosophy degrees. NOTICE AND DISCLAIMER -The Institute of Paper Science and Technology (tPST) has provided a high standard of professional service and has put forth its best efforts within the time and funds available for this project. The information and conclusions are advisory and are intended only for internal use by any company who may receive this report. Each company must decide for itself the best approach to solving any problems it may have and how, or whether, this reported information should be considered in its approach.IPST does not recommend particular products, procedures, materials, or service. These are included only in the interest of completeness within a laboratory context and budgetary constraint. Actual products, procedures, materials, and services used may differ and are peculiar to the operations of each company. in no event shall IPST or its employees and agents have any obligation or liability for damages including, but not limited to, consequential damages arising out of or in connection with any company's use of or inability to use the reported information. tPST provides no warranty or guaranty of results.The institute of Paper Science and Technology assures equal opportunity to ail qualified persons without regard to race, color, religion, sex, national origin, age, disability, marital status, or Vietnam era veterans status in the admission to, participation in, treatment of, or employment in the programs and activities which the Institute operates.

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Synthesis and reactions of hydroxylated stilbenes and their possible occurrence as chromophore precursor structures in lignin

Cited by 14 publications

References 16 publications

Investigation of Three Stilbene Derivatives by X-ray Crystallography and NMR Spectroscopy

Investigation of Three Stilbene Derivatives by X-ray Crystallography and NMR Spectroscopy

Behavioural analysis of a nonionic detergent in the kraft pulp washing process using cryo-time-of-flight secondary ion mass spectrometry and cryo-scanning electron microscopy

Investigation of ortho- and para-Quinone Chromophores in Alkaline Extraction Stage Residual Lignins

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