NDLI: Polyether precursors of molecular recognition systems based on the 9,10-anthraquinone moiety.

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Polyether precursors of molecular recognition systems based on the 9,10-anthraquinone moiety.

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Polyether precursors of molecular recognition systems based on the 9,10-anthraquinone moiety.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nakonieczna, Sandra Wcislo, Anna Niedzialkowski, Pawel Ossowski, Tadeusz Cirocka, Anna Zarzeczanska, Dorota
Description	Author Affiliation: Wcislo A ( Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland. Electronic address: anna.wcislo@ug.edu.pl.); Cirocka A ( Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.); Zarzeczanska D ( Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.); Niedzialkowski P ( Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.); Nakonieczna S ( Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.); Ossowski T ( Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.)
Abstract	A series of novel polyether derivatives of 9,10-anthraquinone (AQ) was synthesized and characterized by means of UV-Vis spectroscopy, acid-base titration and complexometric titration. The results were compared with 1-NEt2AQ and 1-NHEtAQ--model compounds of alkylaminoanthraquinones. Acetonitrile and methanol were used as solvents for determination of spectroscopic and acid-base properties. Complexometric titrations were carried out exclusively in acetonitrile. Spectral characteristic of these compounds strongly depends on pH. Addition of acid causes the decrease of absorption intensity and in some cases also a shift of the visible range band. The weakest base is the compound (2), and the strongest--compound (1), both in methanol and acetonitrile solution. The introduction of an additional substituent in the position 8 of the anthraquinone compound increases its basicity. The presence of metal ions causes changes in intensity of absorption (decrease for compounds (2) and (3) and increase with bathochromic shift for (1) and (4)). For the determination of the coordination properties aluminum (III) ions were chosen. The highest complex stability constant with Al (III) ions is observed for compound (1), and the weakest for compound (3). The elongation of the polyether chain decreases the stability of the complex formed.
ISSN	13861425
Journal	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Volume Number	137
e-ISSN	18733557
Language	English
Publisher	Elsevier
Publisher Date	2015-02-25
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anthraquinones Chemistry Polyesters Acetonitriles Methanol Spectrophotometry, Ultraviolet Methods Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation

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