New group XIV oxide network materials: polygerm- and polygermsilsequioxanes

Gregory M. Jamison; Dougles A. Loy; Kenneth J. Shea

New group XIV oxide network materials: polygerm- and polygermsilsequioxanes

Gregory M. Jamison, Dougles A. Loy, Kenneth J. Shea

Research output: Contribution to journal › Conference article › peer-review

Abstract

Alklylene-bridged polygerm- and polygermsilsesquioxanes have been formed by hydrolysis-condensation of their corresponding (EtO)₃ M(CH₂)_n Ge(OEt)₃ monomers under HCl- and NEt₃ -catalyzed conditions in ethanol. Solid state ¹³C and ²⁹Si NMR indicate the retention of the alkylene bridging moiety during poylmerization; infrared analysis suggests the formation of a small amount of olefinic group. The resulting aerogels are mesoporous materials with high surface areas. Incorporation of the short ethylene bridging unit results in higher surface areas than when hexylene bridges are present. The hexylene bridging group also gives rise to desorption hystereses indicating the presence of bottlenecks in their pore structure.

Original language	English (US)
Pages (from-to)	339-340
Number of pages	2
Journal	Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering
Volume	69
State	Published - 1993
Event	Proceedings of the American Chemical Society Division of Polymeric Materials - Science and Engineering - Chicago, IL, USA Duration: Jun 11 1993 → Jun 11 1993

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Polymers and Plastics

Cite this

@article{0228dd298f7f417786dfafca71c4b43a,

title = "New group XIV oxide network materials: polygerm- and polygermsilsequioxanes",

abstract = "Alklylene-bridged polygerm- and polygermsilsesquioxanes have been formed by hydrolysis-condensation of their corresponding (EtO)3 M(CH2)n Ge(OEt)3 monomers under HCl- and NEt3 -catalyzed conditions in ethanol. Solid state 13C and 29Si NMR indicate the retention of the alkylene bridging moiety during poylmerization; infrared analysis suggests the formation of a small amount of olefinic group. The resulting aerogels are mesoporous materials with high surface areas. Incorporation of the short ethylene bridging unit results in higher surface areas than when hexylene bridges are present. The hexylene bridging group also gives rise to desorption hystereses indicating the presence of bottlenecks in their pore structure.",

author = "Jamison, {Gregory M.} and Loy, {Dougles A.} and Shea, {Kenneth J.}",

year = "1993",

language = "English (US)",

volume = "69",

pages = "339--340",

journal = "Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering",

issn = "0743-0515",

note = "Proceedings of the American Chemical Society Division of Polymeric Materials - Science and Engineering ; Conference date: 11-06-1993 Through 11-06-1993",

}

TY - JOUR

T1 - New group XIV oxide network materials

T2 - Proceedings of the American Chemical Society Division of Polymeric Materials - Science and Engineering

AU - Jamison, Gregory M.

AU - Loy, Dougles A.

AU - Shea, Kenneth J.

PY - 1993

Y1 - 1993

N2 - Alklylene-bridged polygerm- and polygermsilsesquioxanes have been formed by hydrolysis-condensation of their corresponding (EtO)3 M(CH2)n Ge(OEt)3 monomers under HCl- and NEt3 -catalyzed conditions in ethanol. Solid state 13C and 29Si NMR indicate the retention of the alkylene bridging moiety during poylmerization; infrared analysis suggests the formation of a small amount of olefinic group. The resulting aerogels are mesoporous materials with high surface areas. Incorporation of the short ethylene bridging unit results in higher surface areas than when hexylene bridges are present. The hexylene bridging group also gives rise to desorption hystereses indicating the presence of bottlenecks in their pore structure.

AB - Alklylene-bridged polygerm- and polygermsilsesquioxanes have been formed by hydrolysis-condensation of their corresponding (EtO)3 M(CH2)n Ge(OEt)3 monomers under HCl- and NEt3 -catalyzed conditions in ethanol. Solid state 13C and 29Si NMR indicate the retention of the alkylene bridging moiety during poylmerization; infrared analysis suggests the formation of a small amount of olefinic group. The resulting aerogels are mesoporous materials with high surface areas. Incorporation of the short ethylene bridging unit results in higher surface areas than when hexylene bridges are present. The hexylene bridging group also gives rise to desorption hystereses indicating the presence of bottlenecks in their pore structure.

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M3 - Conference article

SN - 0743-0515

VL - 69

SP - 339

EP - 340

JO - Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering

JF - Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering

Y2 - 11 June 1993 through 11 June 1993

ER -

New group XIV oxide network materials: polygerm- and polygermsilsequioxanes

Abstract

ASJC Scopus subject areas

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