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  • Chemistry  (4)
  • spirooxazine  (4)
  • 1
    Digitale Medien
    Digitale Medien
    Effect of Heat Treatment and Additives on the Photochromic and Mechanical Properties of Sol-Gel Derived Photochromic Coatings Containing Spirooxazine (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 923-926 
    Details
    ISSN: 1573-4846
    Schlagwort(e): photochromism ; photochromic coatings ; spirooxazine ; photochromic properties ; mechanical properties
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The experimental results on the photochromic and mechanical properties of coatings containing 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-(3H)-naphth(2,1-b)(1,4) oxazine] (SO) derived from 3-glycidyloxypropyltrimethoxysilane (GPTMS), bisphenol A (BPA) and 1-methylimidazole (MI) by sol-gel processing are presented. It is shown that heat treatment temperature is a conflicting factor to the photochromic intensity (Δ A 0), photostability and abrasion resistance of the photochromic coatings. With increasing densification temperature the matrix rigidity increases leading to a decrease of Δ A 0 and at the same time an enhancement of both abrasion resistance and photostability, the optimum heat treatment temperature is 110°C under our experimental conditions. By the use of certain additives, e.g., fluorosilanes (FAS), not only Δ A 0 but also the photostability and the abrasion resistance of the photochromic coatings have been further improved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1018384913360
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  • 2
    Digitale Medien
    Digitale Medien
    Enhancement of the Photochromic Performance of Spirooxazine in Sol-Gel Derived Organic-Inorganic Hybrid Matrices by Additives (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 927-929 
    Details
    ISSN: 1573-4846
    Schlagwort(e): organic-inorganic hybrids ; sol-gel ; photochromic performance ; spirooxazine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Organic-inorganic hybrid materials synthesized via sol-gel processing are excellent solid matrices for photochromic dyes like spirooxazine, and the photochromic performance can be further enhanced by introducing suitable additives. This work describes the effects of additives on the photochromic intensity (Δ A 0), decolouration rate (k) and photostability of spirooxazine in sol-gel derived organic-inorganic hybrid matrices. They include fluoro-alkylsilane (FAS), bisphenol A (BPA) and methyl-imidazole (MI). FAS enhances both Δ A 0 and photostability, but has little effect on k. The higher the content of BPA, the higher the Δ A 0 and the higher the photostability, but the lower the k. The effect of MI on Δ A 0 and k is not so considerable as that of BPA and is a little complicated, while significant improvement in photostability is achieved by the addition of MI at an optimum concentration with the presence of BPA at a higher content.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1018337030198
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  • 3
    Digitale Medien
    Digitale Medien
    Effect of heat treatment and additives on the photochromic and mechanical properties of sol-gel derived photochromic coatings containing spirooxazine (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 923-926 
    Details
    ISSN: 1573-4846
    Schlagwort(e): photochromism ; photochromic coatings ; spirooxazine ; photochromic properties ; mechanical properties
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The experimental results on the photochromic and mechanical properties of coatings containing 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-(3H)-naphth(2,1-b)(1,4) oxazine] (SO) derived from 3-glycidyl-oxypropyltrimethoxysilane (GPTMS), bisphenolA (BPA) and 1-methylimidazole (MI) by sol-gel processing are presented. It is shown that heat treatment temperature is a conflicting factor to the photochromic intensity (ΔA 0), photostability and abrasion resistance of the photochromic coatings. With increasing densification temperature the matrix rigidity increases leading to a decrease of ΔA 0 and at the same time an enhancement of both abrasion resistance and photostability, the optimum heat treatment temperature is 110°C under our experimental conditions. By the use of certain additives, e.g., fluorosilanes (FAS), not only ΔA 0 but also the photostability and the abrasion resistance of the photochromic coatings have been further improved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02436961
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  • 4
    Digitale Medien
    Digitale Medien
    Enhancement of the photochromic performance of spirooxazine in sol-gel derived organic-inorganic hybrid matrices by additives (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 927-929 
    Details
    ISSN: 1573-4846
    Schlagwort(e): organic-inorganic hybrids ; sol-gel ; photochromic performance ; spirooxazine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Organic-inorganic hybrid materials synthesized via sol-gel processing are excellent solid matrices for photochromic dyes like spirooxazine, and the photochromic performance can be further enhanced by introducing suitable additives. This work describes the effects of additives on the photochromic intensity (ΔA 0), decolouration rate (k) and photostability of spirooxazine in sol-gel derived organic-inorganic hybrid matrices. They include fluoroalkylsilane (FAS), bisphenolA (BPA) and methyl-imidazole (MI). FAS enhances both ΔA 0 and photostability, but has little effect onk. The higher the content of BPA, the higher the ΔA 0 and the higher the photostability, but the lower thek. The effect of MI on ΔA 0 andk is not so considerable as that of BPA and is a little complicated, while significant improvement in photostability is achieved by the addition of MI at an optimum concentration with the presence of BPA at a higher content.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02436962
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  • 5
    Digitale Medien
    Digitale Medien
    Application of HPLC to inorganic analysis Part VII: Comparison between pre-column- and on-column derivatization for separation of different metal oxinates; quantitative determination of Mn(II) besides Mn(III) ions (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 439-440 
    Details
    ISSN: 0935-6304
    Schlagwort(e): Liquid chromatography, HPLC ; Reversed phase mode ; Metal oxinates ; Quantitative determination of Mn(II) besides Mn(III), in natural waters and fertile soils ; Pre-column and on-column derivatization ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jhrc.1240050812
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  • 6
    Digitale Medien
    Digitale Medien
    Azomethine der Furancarboxaldehyde mit α-Amino-N-heterocyclenHerrn Prof. Dr. Dr. h. c. mult. A. Rieche mit besten Wünschen zum 85. Geburtstag gewidmet (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 937-944 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Azomethines from Furancarboxaldehydes and α-Amino-N-heterocycles
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.19873290527
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  • 7
    Digitale Medien
    Digitale Medien
    Untersuchungen zur Korrosion und zum Korrosionsschutz von meerwassergekühlten Rohrkondensatoren aus Kupferbasislegierungen-Versuche mit rotierenden Proben (1983)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 34 (1983), S. 583-592 
    Details
    ISSN: 0947-5117
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Investigations on the corrosion and corrosion protection of seawater cooled condensor tubes of copper-base alloys - Experiments with rotating samplesExperiments have been done on rotating disc and cylinder electrodes of CuZn20Al2, CuNi10Fe and CuNi30Fe in 3 w/o sodium chloride solution and in artificial sea water at 25 and 40 ° C.Erosion corrosion of sea water cooled tube condensors should be simulated and studied.The corrosion mechanism of copper base alloys in clean and polluted sea water was intensely studied with particular consideration to the influence of ammonia, sulfides and chlorine. The effectiveness of iron sulfate dosing was tested.With the rotating samples under test no erosion corrosion could be detected on free corroding specimens.
    Notizen: An rotierenden Scheiben und Zylinderproben aus CuZn20Al2, CuNi10Fe und CuNi30Fe wurden Korrosionsversuche in 3%iger Natriumchloridlösung und in synthetischem Meerwasser bei 25 und 40 ° C durchgeführt. Dabei sollten auch die Vorgänge bei der Erosionskorrosion von meerwassergekühlten Rohrkondensatoren simuliert und untersucht werden. Es wurden umfangreiche Messungen zum Korrosionsmechanismus der Kupferbasislegierungen in sauberem und verunreinigtem Meerwasser durchgeführt, wobei der Einfluss von Ammoniak, Sulfiden und Chlor sowie die Wirksamkeit der Eisensulfatdosierung untersucht wurden. An den verwendeten rotierenden Proben konnte bei freier Korrosion keine Erosion erzeugt werden.
    Zusätzliches Material: 13 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/maco.19830341203
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  • 8
    Digitale Medien
    Digitale Medien
    Haftkraftmessung mit der Zentrifugenmethode  -  Einfluß grenzflächenaktiver Stoffe (1997)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 69 (1997), S. 1223-1224 
    Details
    ISSN: 0009-286X
    Schlagwort(e): Chemistry ; Industrial Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cite.330690911
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