Abstract
Enhanced site isolation and reduced site mobility have been demonstrated in polystyrene networks having trityl functionality at the cross-links through steady-state fluorescence measurements of intraresin excimer formation by 4-(1-pyrenyl)butanol labels and through ESR nitroxide spin-label studies. Suspension (copolymerization of α,α-bis(4-vinylphenyl)benzyl alcohol with styrene afforded beads having trityl groups at the cross-links (C·Tr). Pendent-functionalized beads (P·Tr), prepared by copolymerization of of α,α-diphenyl-4-vinylbenzyl alcohol with styrene and divinylbenzene served as a reference. Comparison of (Ie/Im) as a function of polymer loading and solvent demonstrated that crosslink functionalization reduced site interactions, providing 30% higher effective dilution of labels. ESR of. polymers labeled with 2,2,6,6-tetramethyl-4-oxopiperidin-1-oxyl oxime demonstrated C·Tr are less mobile than P·Tr. Possible origins of enhanced site-separation and reduced mobility are discussed and explored through various experimentes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3340-3348 |
| Number of pages | 9 |
| Journal | Macromolecules |
| Volume | 30 |
| Issue number | 11 |
| State | Published - Jun 2 1997 |
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ASJC Scopus subject areas
- Materials Chemistry
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Enhanced site isolation in cross-link-functionalized polystyrene networks : Mobility studies using steady-state fluorescence and ESR techniques. / Wilson, Mark E.; Wilson, Jennifer A.; Kurth, Mark J.
In: Macromolecules, Vol. 30, No. 11, 02.06.1997, p. 3340-3348.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enhanced site isolation in cross-link-functionalized polystyrene networks
T2 - Mobility studies using steady-state fluorescence and ESR techniques
AU - Wilson, Mark E.
AU - Wilson, Jennifer A.
AU - Kurth, Mark J.
PY - 1997/6/2
Y1 - 1997/6/2
N2 - Enhanced site isolation and reduced site mobility have been demonstrated in polystyrene networks having trityl functionality at the cross-links through steady-state fluorescence measurements of intraresin excimer formation by 4-(1-pyrenyl)butanol labels and through ESR nitroxide spin-label studies. Suspension (copolymerization of α,α-bis(4-vinylphenyl)benzyl alcohol with styrene afforded beads having trityl groups at the cross-links (C·Tr). Pendent-functionalized beads (P·Tr), prepared by copolymerization of of α,α-diphenyl-4-vinylbenzyl alcohol with styrene and divinylbenzene served as a reference. Comparison of (Ie/Im) as a function of polymer loading and solvent demonstrated that crosslink functionalization reduced site interactions, providing 30% higher effective dilution of labels. ESR of. polymers labeled with 2,2,6,6-tetramethyl-4-oxopiperidin-1-oxyl oxime demonstrated C·Tr are less mobile than P·Tr. Possible origins of enhanced site-separation and reduced mobility are discussed and explored through various experimentes.
AB - Enhanced site isolation and reduced site mobility have been demonstrated in polystyrene networks having trityl functionality at the cross-links through steady-state fluorescence measurements of intraresin excimer formation by 4-(1-pyrenyl)butanol labels and through ESR nitroxide spin-label studies. Suspension (copolymerization of α,α-bis(4-vinylphenyl)benzyl alcohol with styrene afforded beads having trityl groups at the cross-links (C·Tr). Pendent-functionalized beads (P·Tr), prepared by copolymerization of of α,α-diphenyl-4-vinylbenzyl alcohol with styrene and divinylbenzene served as a reference. Comparison of (Ie/Im) as a function of polymer loading and solvent demonstrated that crosslink functionalization reduced site interactions, providing 30% higher effective dilution of labels. ESR of. polymers labeled with 2,2,6,6-tetramethyl-4-oxopiperidin-1-oxyl oxime demonstrated C·Tr are less mobile than P·Tr. Possible origins of enhanced site-separation and reduced mobility are discussed and explored through various experimentes.
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M3 - Article
AN - SCOPUS:0031548793
VL - 30
SP - 3340
EP - 3348
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 11
ER -