In Situ Water-Compatible Polymer Entrapment: A Strategy for Transferring Superhydrophobic Microporous Organic Polymers to Water

Abstract

Microporous organic polymer nanoparticles bearing tetraphenylethylene moieties (MOPTs) were prepared in the presence of poly(vinylpyrrolidone) (PVP). The PVP was entrapped into the microporous network of MOPT to form MOPT-P and played the roles of size control, porosity enhancement, and surface property management. MOPT materials without PVP showed superhydrophobicity with a water contact angle of 151°. In comparison, the MOPT-P showed excellent water compatibility. Moreover, due to the aggregation-induced emission property of tetraphenylethylene moieties, the MOPT-P showed emission and excellent emission-based sensing of nitrophenols in water with K sv values in the range of 1.26 × 10 4 ∼ 3.37 × 10 4 M −1 . It is noteworthy that the MOPT-P used water only as a sensing medium and did not require additional organic solvents to enhance water dispersibility of materials. The MOPT-P could be recovered and reused for the sensing at least five times.

Confining Palladium Nanoparticles in Microporous Tetrastyrene Polymer Enables Efficient Size-Selective Heterogeneous Catalysis

“…It is widely known that the adsorption of N 2 is easy for a microporous material, but the desorption of N 2 from micropores is relatively difficult, often resulting in that the adsorption and desorption isotherm does not form a loop. This phenomenon has been frequently observed on organic microporous polymers reported in the literature. − According to the Brunauer–Emmett–Teller (BET) model, the surface area of Pd@MTP catalysts declines with the increasing of Pd content: 705 m 2 /g for Pd@MTP-1), 557 m 2 /g for Pd@MTP-2), 487 m 2 /g for Pd@MTP-3, and 85 m 2 /g for Pd@MTP-4 (Figure a and Figure S7). This phenomenon is probably ascribed to the increased occupation of nanochannel in MTP by Pd NPs.…”

Concomitant Covalent and Noncovalent Assembly: Self-Assembly of Sublimable Caffeine in the Formation of Microporous Organic Polymer for Morphology Evolution and Enhanced Performance

“…The Stern–Volmer constants ( K sv ) of the AIE quenching of TPE-MOP-1, TPE-MOP-4, and TPE-MOP-6 by TNP were measured to be 1.25 × 10 4 , 4.77 × 10 4 , and 3.82 × 10 4 M –1 , respectively (Figure S10 in the SI). It is noteworthy that the K sv value of TPE-MOP-4 is superior or comparable to those of the recent AIE-based MOP materials in the literature − (Table S3 in the SI). Also, the trend of sensing performance indicates that the AIE quenching-based sensing performance of TPE-MOPs is very sensitive to their thicknesses and the diffusion pathways of the sensing target compound .…”

Interfacial Synthesis of Conjugated Crystalline 2D Fluorescent Polymer Film Containing Aggregation‐Induced Emission Unit

“…On the other hand, tetraphenylethene (TPE) has been broadly used in constructing fluorescent solid materials owing to its unique aggregation‐induced emission (AIE) behavior . Indeed, many TPE‐based fluorescent 2D porous polymers have been reported taking advantage of this unique property . Whereas, it is still a big challenge to develop a general strategy for synthesizing crystalline fluorescent thin films with well‐defined structures, although it is the key for future applications.…”