In‐Situ Electrostatic Self‐Assembly of Conjugated Polyelectrolytes in a Film

Highly Emissive, Water‐Repellent, Soft Materials: Hydrophobic Wrapping and Fluorescent Plasticizing of Conjugated Polyelectrolyte via Electrostatic Self‐Assembly

“…[14] In a previous study, when SPDPA was combined with a cationic surfactant (O 1 M 3 AB, Figure 1) containing one long hydrophobic tail (O 1 , octadecyl group) in situ in a film, the polymer no longer dissolved in water and the FL was remarkably enhanced. [8] This result occurred because the hydrophobic tails wrapped the polymer chain to make it waterrepellent, and also acted as a plasticizer to make the IaSS loose in order to open the radiative emission decay channel more eff iciently. [13a,14b] To investigate such hydrophobic wrapping and fluorescent plasticizing effects in more detail, (octadecyl) Figure 1) having different numbers of hydrophobic tails were examined as cationic surfactants.…”

“…[6] In this regard, ESA should be one of the simplest pathways for chemical modification of CPEs. The significant optical changes that result should be a very fascinating development in surfactant chemistry that could lead to investigation of some advanced practical applications.The ESA of CPEs has only been examined in a one-phase system of an aqueous colloidal solution, [7] except for one case of an in situ ESA in a film, [8] because ESA of CPEs can lead to a change in the water-solubility of CPEs that may cause sudden precipitation in water, which would destroy the homogeneous system. Because of this possibility, in most cases, FL emission properties of CPE-surfactant complexes have been examined in aqueous colloidal solutions.…”

C,N-Codoped TiO2 with a Nitrogen-Doped Carbon Coating Derived from 2,6-Diaminopyridine for Visible Light-Induced Photocatalytic Hydrogen Evolution

“…The PL emission decay profiles (Figure 8c) recorded for CN@C,N-TiO 2 -450 and C,N-TiO 2 -450 were expressed by biexponential fitting, which suggested that the PL decay takes place through two relaxation pathways. 52 Table S2 summarizes the PL lifetimes (τ), fractional intensities (f), and amplitude-weighted average lifetimes (τ ave = f 1 τ 1 + f 2 τ 2 ). The τ ave of CN@C,N-TiO 2 -450 was 4.30 ns, which is lower than that of C,N-TiO 2 -450 (5.17 ns).…”

Properties, Functions, Chemical Transformation, Nano-, and Hybrid Materials of Poly(diphenylacetylene)s toward Sensor and Actuator Applications

“…Recently, we conducted an in situ electrostatic self-assembly (ESA) of SPDPA-H C film as a new approach to achieve chemical modification within selected areas on a film. 52 The in situ ESA was realized simply by dipping the SPDPA-H C film into appropriate cationic surfactant solutions. The SPDPA-H C underwent supramolecular disorder-to-order rearrangement very effectively through the in situ ESA and exhibited a dramatic FL emission enhancement of »50 times.…”