Dye Encapsulation in Polynorbornene Micelles

Nia C. Bell; Samantha J. Doyle; Giulia Battistelli; Clare L M Leguyader; Matthew P. Thompson; Ambata M. Poe; Arnold Rheingold; Curtis Moore; Marco Montalti; S. Thayumanavan; Michael J. Tauber; Nathan C. Gianneschi

doi:10.1021/acs.langmuir.5b01822

Dye Encapsulation in Polynorbornene Micelles

Nia C. Bell, Samantha J. Doyle, Giulia Battistelli, Clare L M Leguyader, Matthew P. Thompson, Ambata M. Poe, Arnold Rheingold, Curtis Moore, Marco Montalti, S. Thayumanavan, Michael J. Tauber, Nathan C. Gianneschi^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The encapsulation efficiency of high-T_g polynorbornene micelles was probed with a hydrophobic dye 2,6-diiodoboron-dipyrromethene (BODIPY). Changes in the visible absorption spectra of aggregated versus monomeric dye molecules provided a probe for assessing encapsulation. Polynorbornene micelles are found to be capable of loading up to one BODIPY dye per ten polymers. As the hydrophilic block size increased in the polymeric amphiphiles, more of the dye was incorporated within the micelles. This result is consistent with the dye associating with the polymer backbone in the shell of the micelles. The encapsulation rate varied significantly with temperature, and a slight dependence on micellar morphology was also noted. Additionally, we report a 740 μs triplet lifetime for the encapsulated BODIPY dye. The lifetime is the longest ever recorded for a BODIPY triplet excited state at room temperature and is attributed to hindered triplet-triplet annihilation in the high-viscosity micellar shell.

Original language	English (US)
Pages (from-to)	9707-9717
Number of pages	11
Journal	Langmuir
Volume	31
Issue number	35
DOIs	https://doi.org/10.1021/acs.langmuir.5b01822
State	Published - Sep 8 2015

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/acs.langmuir.5b01822

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title = "Dye Encapsulation in Polynorbornene Micelles",

abstract = "The encapsulation efficiency of high-Tg polynorbornene micelles was probed with a hydrophobic dye 2,6-diiodoboron-dipyrromethene (BODIPY). Changes in the visible absorption spectra of aggregated versus monomeric dye molecules provided a probe for assessing encapsulation. Polynorbornene micelles are found to be capable of loading up to one BODIPY dye per ten polymers. As the hydrophilic block size increased in the polymeric amphiphiles, more of the dye was incorporated within the micelles. This result is consistent with the dye associating with the polymer backbone in the shell of the micelles. The encapsulation rate varied significantly with temperature, and a slight dependence on micellar morphology was also noted. Additionally, we report a 740 μs triplet lifetime for the encapsulated BODIPY dye. The lifetime is the longest ever recorded for a BODIPY triplet excited state at room temperature and is attributed to hindered triplet-triplet annihilation in the high-viscosity micellar shell.",

author = "Bell, {Nia C.} and Doyle, {Samantha J.} and Giulia Battistelli and Leguyader, {Clare L M} and Thompson, {Matthew P.} and Poe, {Ambata M.} and Arnold Rheingold and Curtis Moore and Marco Montalti and S. Thayumanavan and Tauber, {Michael J.} and Gianneschi, {Nathan C.}",

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doi = "10.1021/acs.langmuir.5b01822",

language = "English (US)",

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T1 - Dye Encapsulation in Polynorbornene Micelles

AU - Bell, Nia C.

AU - Doyle, Samantha J.

AU - Battistelli, Giulia

AU - Leguyader, Clare L M

AU - Thompson, Matthew P.

AU - Poe, Ambata M.

AU - Rheingold, Arnold

AU - Moore, Curtis

AU - Montalti, Marco

AU - Thayumanavan, S.

AU - Tauber, Michael J.

AU - Gianneschi, Nathan C.

PY - 2015/9/8

Y1 - 2015/9/8

N2 - The encapsulation efficiency of high-Tg polynorbornene micelles was probed with a hydrophobic dye 2,6-diiodoboron-dipyrromethene (BODIPY). Changes in the visible absorption spectra of aggregated versus monomeric dye molecules provided a probe for assessing encapsulation. Polynorbornene micelles are found to be capable of loading up to one BODIPY dye per ten polymers. As the hydrophilic block size increased in the polymeric amphiphiles, more of the dye was incorporated within the micelles. This result is consistent with the dye associating with the polymer backbone in the shell of the micelles. The encapsulation rate varied significantly with temperature, and a slight dependence on micellar morphology was also noted. Additionally, we report a 740 μs triplet lifetime for the encapsulated BODIPY dye. The lifetime is the longest ever recorded for a BODIPY triplet excited state at room temperature and is attributed to hindered triplet-triplet annihilation in the high-viscosity micellar shell.

AB - The encapsulation efficiency of high-Tg polynorbornene micelles was probed with a hydrophobic dye 2,6-diiodoboron-dipyrromethene (BODIPY). Changes in the visible absorption spectra of aggregated versus monomeric dye molecules provided a probe for assessing encapsulation. Polynorbornene micelles are found to be capable of loading up to one BODIPY dye per ten polymers. As the hydrophilic block size increased in the polymeric amphiphiles, more of the dye was incorporated within the micelles. This result is consistent with the dye associating with the polymer backbone in the shell of the micelles. The encapsulation rate varied significantly with temperature, and a slight dependence on micellar morphology was also noted. Additionally, we report a 740 μs triplet lifetime for the encapsulated BODIPY dye. The lifetime is the longest ever recorded for a BODIPY triplet excited state at room temperature and is attributed to hindered triplet-triplet annihilation in the high-viscosity micellar shell.

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Dye Encapsulation in Polynorbornene Micelles

Abstract

ASJC Scopus subject areas

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