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Quaternary ammonium salt photobase g...

Jensen, Kathryn Helen.

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Quaternary ammonium salt photobase generators.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Quaternary ammonium salt photobase generators./
作者:	Jensen, Kathryn Helen.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 1996,
面頁冊數:	156 p.
附註:	Source: Dissertation Abstracts International, Volume: 57-10, Section: B, page: 6264.
Contained By:	Dissertation Abstracts International57-10B.
標題:	Organic chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9710877
ISBN:	9780591183634

Quaternary ammonium salt photobase generators.
Jensen, Kathryn Helen.

Quaternary ammonium salt photobase generators. - Ann Arbor : ProQuest Dissertations & Theses, 1996 - 156 p.

Source: Dissertation Abstracts International, Volume: 57-10, Section: B, page: 6264.

Thesis (Ph.D.)--Seton Hall University, 1996.

Novel tertiary amine photobase generators have been synthesized and studied. The two systems investigated were quaternary ammonium salts of benzhydryl amines and fluorenyl amines. Syntheses were achieved by alkylation of the amines or by reaction of an amine with 9-bromofluorene, in some cases followed by exhaustive methylation. Alkylation was limited to methylation in the benzhydryl system, as larger alkyl groups would not react. Molecular modeling of benzhydrylamine confirmed the steric hindrance problem on the nitrogen. Examination of the solution photochemistry by NMR spectroscopy supported a heterolytic mechanism for photodecomposition. A method was developed for determining the quantum yield in order to evaluate the efficiency of the photogeneration of the tertiary amine. The quantum yield for quinuclidine fluorenylammonium bromide (17) was measured to be $0.52\pm 0.08.$.

ISBN: 9780591183634Subjects--Topical Terms:

523952
Organic chemistry.

Quaternary ammonium salt photobase generators.
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245 1 0 $a Quaternary ammonium salt photobase generators.
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500 $a Source: Dissertation Abstracts International, Volume: 57-10, Section: B, page: 6264.
500 $a Adviser: James E. Hanson.
502 $a Thesis (Ph.D.)--Seton Hall University, 1996.
520 $a Novel tertiary amine photobase generators have been synthesized and studied. The two systems investigated were quaternary ammonium salts of benzhydryl amines and fluorenyl amines. Syntheses were achieved by alkylation of the amines or by reaction of an amine with 9-bromofluorene, in some cases followed by exhaustive methylation. Alkylation was limited to methylation in the benzhydryl system, as larger alkyl groups would not react. Molecular modeling of benzhydrylamine confirmed the steric hindrance problem on the nitrogen. Examination of the solution photochemistry by NMR spectroscopy supported a heterolytic mechanism for photodecomposition. A method was developed for determining the quantum yield in order to evaluate the efficiency of the photogeneration of the tertiary amine. The quantum yield for quinuclidine fluorenylammonium bromide (17) was measured to be $0.52\pm 0.08.$.
520 $a The photogeneration of base should be useful in materials processing applications, two such systems were investigated. First, it was determined that the quaternary ammonium salt photobase generators could be used for the catalysis of sol-gel chemistry. The tertiary amine photoproduct was present as the ammonium bromide salt, which resulted in a glassy morphology for the xerogel and glass products. Second, the photobase generators were used in the development of a chemically amplified photoresist. This required the design and synthesis of a new family of diurethane dissolution inhibitor compounds. Several photoresist schemes were developed and studied that employed base catalyzed hydrolysis of the diurethane dissolution inhibitors in novolac films.
590 $a School code: 0199.
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710 2 $a Seton Hall University. $3 1026097
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