Fluorescence Enhancement of the Water- Soluble Poly{1,4-phenylene-[9,9-bis- (4-phenoxybutylsulfonate)]fluorene-2,7-diyl} Copolymer in n-Dodecylpentaoxyethylene Glycol Ether Micelles

doi:10.1021/MA048780+

Paper

Fluorescence Enhancement of the Water- Soluble Poly{1,4-phenylene-[9,9-bis- (4-phenoxybutylsulfonate)]fluorene-2,7-diyl} Copolymer in n-Dodecylpentaoxyethylene Glycol Ether Micelles

Published Oct 5, 2004 · H. Burrows, V. Lobo, J. Pina

Macromolecules

Q1 SJR score

87

Citations

0

Influential Citations

Full textSemantic Scholar

Abstract

Interest is increasing in water-soluble conjugated polymers in areas such as chemical/biological sensors1,2 and self-assembly systems.3 In addition, introduction of ink jet printing for fabricating light-emitting diode (LED) displays4 will increase demand for these waterbased systems. Marked changes in fluorescence occur on adding surfactants.1b,2c Both surfactant complexation1b and breakup of polymer aggregates2c have been proposed as explanations. The high fluorescence yields and blue emission of polymers involving 2,7-linked fluorene units make them among the most attractive classes of conjugated polymers for devices5 and good candidates for the above applications. We report the effect of the nonionic n-dodecylpentaoxyethylene glycol ether (C12E5) on properties of the water-soluble poly{1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl} copolymer (PBS-PFP, Figure 1B). The polymer (Mh n) ∼6500 g mol-1) was synthesized by condensation of 2,7dibromo-9,9-bis(4-sulfonylbutoxyphenyl)fluorene (A) and 1,4-phenylenediboronic acid using Pd(PPh3)4 as catalyst. Details of synthesis and characterization are given in the Supporting Information. Aqueous solutions of PBS-PFP showed a broad absorption around 381 nm and a structured fluorescence (λmax 424, 448, 475 nm (shoulder)). Band shapes are similar to the related copolymer poly[2,7-(9,9-bis(2′ethylhexylfluorene)-alt-1,4-phenylene] (PFP).6 Upon addition of C12E5 (3.3 × 10-8-5.34 × 10-4 M) to PBSPFP (6 mg/L, 9.2 × 10-7 M),7 blue shifts in absorption (11 nm) and emission (13 nm, Figure 2) maxima, and marked increases in absorbance and fluorescence intensity were observed. With a poly(ethylene oxide) of similar size to C12E5 headgroup (PEG 200 e 2.3 × 10-4 M), only a decrease in fluorescence intensity was observed, with no change in band shape, showing the importance of the surfactant. Fluorescence quantum yields (Φf), lifetimes, and shifts in emission maxima are shown as functions of surfactant concentration (Figure 3).7 Although the decay should strictly be treated as biexponential, with the time resolution of our system and the relatively small difference in the lifetimes, it was not possible to obtain a statistically significant separation into two exponentials, and the decay was taken as monoexponential. All these properties change at surfactant concentrations greater than the C12E5 critical micelle concentration (cmc, (5 ( 2) × 10-5 M),8,9c suggesting they result from incorporation of polymer into micelles. PBS-PFP † Universidade de Coimbra. ‡ Universidad de Burgos. § Bergische Universität Wuppertal. * Corresponding authors. E-mail: burrows@ci.uc.pt; mjtapia@ ubu.es. Figure 1. Synthetic scheme and structure of poly{1,4phenylene-[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7diyl}. Volume 37, Number 20 October 5, 2004

Highly Cited

Study Snapshot

Adding n-dodecylpentaoxyethylene glycol ether (C12E5) to water-soluble poly1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Sign up to use Study Snapshot

Consensus is limited without an account. Create an account or sign in to get more searches and use the Study Snapshot.

Create an account

Paper

Fluorescence Enhancement of the Water- Soluble Poly{1,4-phenylene-[9,9-bis- (4-phenoxybutylsulfonate)]fluorene-2,7-diyl} Copolymer in n-Dodecylpentaoxyethylene Glycol Ether Micelles

Sign up to use Study Snapshot

References

Citations

Nanostructuring with Surfactants: The Self-Assembly of a New Poly(thiophene-phenylene) Conjugated Polymer Bearing Azacrown Ether Pendant Groups.

BG2, a new conjugated polymer with crown ether moieties, can be nanostructured with surfactants, resulting in increased photoluminescence quantum yields and improved stability.

Paper-Based Probes with Visual Response to Vapors from Nitroaromatic Explosives: Polyfluorenes and Tertiary Amines

PolyDMAEMA-coated paper strips can effectively detect and quantify nitroaromatic explosive vapors, making them a promising tool for environmental monitoring.

Hole transport layers for organic solar cells: recent progress and prospects

Organic hole transport layer materials have shown promising advances in organic solar cells, improving power conversion efficiency and stability, making them suitable for large-scale commercial production.

Effect of sodium salts on diffusion of poly(vinyl alcohol) in aqueous solutions

Sodium salts (NaCl and Na2SO4) significantly impact the transport and thermodynamic behavior of poly(vinyl alcohol) in aqueous solutions, as shown by tracer diffusion coefficient measurements.

Benzothiadiazole-based conjugated polyelectrolytes for interfacial engineering in optoelectronic devices

Poly(9,9-bis(6′-diethoxylphosphorylhexyl)-alt-benzothiadiazole) (P2) improves performance in organic solar cells and light-emitting diodes by tailoring the energy gap and side functionalities.