Fluorescence study of pyrene chemically bound to controlled-pore glasses

Zilberstein, Judith; Bromberg, A.; Berkovic, Garry

doi:10.1016/1010-6030(94)80010-3

“…156 They prepared a pH sensitive silica gel by the covalent attachment of an anthracene fluorophore to the surface of silica. Also pyrene for oxygen sensitivity, 157 fluorescein isocyanate for fluorometric pH measurements, 155 ruthenium complexes for oxygen 158,159 or for pH sensing 160 have been covalently attached to sol-gel glass films.…”

Section: Sol-gel Materialsmentioning

confidence: 99%

Design of fluorescent materials for chemical sensing

Basabe‐Desmonts

¹

,

Reinhoudt

²

,

Crego‐Calama

³

2007

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There is an enormous demand for chemical sensors for many areas and disciplines. High sensitivity and ease of operation are two main issues for sensor development. Fluorescence techniques can easily fulfill these requirements and therefore fluorescent-based sensors appear as one of the most promising candidates for chemical sensing. However, the development of sensors is not trivial; material science, molecular recognition and device implementation are some of the aspects that play a role in the design of sensors. The development of fluorescent sensing materials is increasingly captivating the attention of the scientists because its implementation as a truly sensory system is straightforward. This critical review shows the use of polymers, sol-gels, mesoporous materials, surfactant aggregates, quantum dots, and glass or gold surfaces, combined with different chemical approaches for the development of fluorescent sensing materials. Representative examples have been selected and they are commented here.

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“…Variable temperature emission studies are helpful in analyzing the origin of excimer formation: whether the excimers were formed by a dynamic mechanism through diffusional encounters or by a static mechanism through the direct excitation of ground state aggregates. 45 The temperature dependent emission studies were conducted for 0.1 OD solution of all polymers in at excitation wavelengths of 343 and 395 nm. The emission was recorded in the temperature range from 0 to 85 °C while heating and cooled back to 0 °C (0 °C → 85 °C → 0 °C) at an interval of 10 °C.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

H-Bonding vs Non-H-Bonding in 100% Pyrene Methacrylate Comb Polymers: Self-Assembly Probed by Time-Resolved Emission Spectra and Temperature Dependent Fluorescence

Kaushlendra

¹

,

Asha

²

2014

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The differences in self-organization behavior in novel 100% pyrene labeled comb methacrylate polymers probed as a function of their varied origins of excimer formation are presented. The different structural variations in the polymers included the presence or absence of hydrogen bonding interactions in the form of urethane linkages, short or long alkyl spacer segments separating the pyrene units from the polymer backbone and linear versus kinked urethane linkage. The effect of variable concentration and temperature on the chemical shift of the NH proton of the urethane linkage was probed using (1)H NMR experiments conducted at temperatures varying from 25 to 70 °C at two different concentrations (2.5 and 25 mmol) in DMSO-d6 as solvent. The photophysical properties of the polymers in dilute DMF solutions were investigated by steady state emission, fluorescence decay studies, time-resolved emission spectra (TRES), and variable temperature emission studies. It was observed that the polymer poly(PBH) having a non-hydrogen-bondable ester linkage in the pendant chains formed an excimer completely via a static mechanism and the ground state aggregate species were not broken even at higher temperatures. The polymer poly(PIC) having a short hydrogen-bondable urethane linkage formed an excimer via a static as well as dynamic mechanism. The other hydrogen-bondable urethane methacrylate polymers having a linear linker poly(PHH) and kinked linker (PIHP) formed excimer mostly via a dynamic mechanism with a very small contribution from the static route. The TRES studies carried out for the polymers provided significant insight into the excimer formation mechanism in these polymers. The variable temperature fluorescence studies highlighted the differences in the H-bonded vs non-H-bonded polymer as a function of their excimer recovery upon cooling.

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“…156 They prepared a pH sensitive silica gel by the covalent attachment of an anthracene fluorophore to the surface of silica. Also pyrene for oxygen sensitivity, 157 fluorescein isocyanate for fluorometric pH measurements, 155 ruthenium complexes for oxygen 158,159 or for pH sensing 160 have been covalently attached to sol-gel glass films. However, doping is actually the most common method for entrapment of the fluorophore in the glass.…”

Section: Sol-gel Materialsmentioning

confidence: 99%

Design of Fluorescent Materials for Chemical Sensing

Basabe‐Desmonts

¹

,

Reinhoudt

²

,

Crego‐Calama

³

2007

View full text Add to dashboard Cite

There is an enormous demand for chemical sensors for many areas and disciplines. High sensitivity and ease of operation are two main issues for sensor development. Fluorescence techniques can easily fulfill these requirements and therefore fluorescent-based sensors appear as one of the most promising candidates for chemical sensing. However, the development of sensors is not trivial; material science, molecular recognition and device implementation are some of the aspects that play a role in the design of sensors. The development of fluorescent sensing materials is increasingly captivating the attention of the scientists because its implementation as a truly sensory system is straightforward. This critical review shows the use of polymers, sol-gels, mesoporous materials, surfactant aggregates, quantum dots, and glass or gold surfaces, combined with different chemical approaches for the development of fluorescent sensing materials. Representative examples have been selected and they are commented here.

show abstract

Fluorescence study of pyrene chemically bound to controlled-pore glasses

Cited by 21 publications

References 48 publications

Design of fluorescent materials for chemical sensing

Design of fluorescent materials for chemical sensing

H-Bonding vs Non-H-Bonding in 100% Pyrene Methacrylate Comb Polymers: Self-Assembly Probed by Time-Resolved Emission Spectra and Temperature Dependent Fluorescence

Design of Fluorescent Materials for Chemical Sensing

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