The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Four new polyaryleneethynylenes P1–P4, which contained different aromatic or perfluoroaromatic isolation groups, were successfully prepared, via the palladium-catalyzed Sonogashira coupling reaction. Among them, P2, due to the presence of the self-assembly effect between the perfluoroaromatic and chromophore moieties, demonstrated much larger NLO effect (d 33 value of 162.3 pm/V) and better...
The development of organic/polymeric materials with second-order nonlinear optical (NLO) performance became more and more important, due to the increasing potential for the applications in photonic devices and many advantages over conventional inorganic crystalline materials in the last few decades, especially after 1980s. So far, the NLO polymers have developed from the initial guest-host systems,...
A new DDTC-functionalized disubstituted polyacetylene (P2) with strong green fluorescence was successfully synthesized by utilizing the postfunctional method. The polymer was soluble in common organic solvents, and its strong green fluorescence could be quenched by mercury ions with detection limit down to 1.7 × 10 −7 mol/L (34 ppb). Moreover, nearly no interference was observed from other...
In this paper, tetraphenylethylene (TPE) units, one of the typical aggregation-induced emission (AIE) moieties, are utilized to construct a new functional polyfluorene (PF) P1, which exhibited the exciting property of the aggregation-induced emission enhancement (AIEE), instead of the aggregation-caused quenching (ACQ) of normal PFs, and could probe the explosive with high sensitivity both in the...
A series of water-soluble poly(p-phenylene)s (PPPs), named N-PPPx (x = 10, 25 and 50), were directly synthesized by Suzuki coupling in aqueous solution. The structures of the polymers were characterized by 1 H NMR and elemental analysis. The polymers exhibit similar absorption and emission spectra with three absorption maxima at ca. 205, 290 and 350 nm, and emission maximum at 420 nm in phosphate...
In this paper, two new series of hyperbranched main-chain polymers, P1–P6, with chromophore moieties as the core were successfully prepared through “A 3 +B 2 ” approach via simple Sonogashira coupling reaction. By changing the bulky size of comonomers, the structure-property relationship has been investigated according to the concept of “suitable isolation group”. The second harmonic...
In this paper two conjugated polymers containing polyfluorene chain with pendant carboxyl group (P1 and P2) are synthesized via Suzuki reaction, and then two corresponding polymers containing the pendant Mn 12 cluster core (Mn 12 -P1 and Mn 12 -P2) are obtained through exchange of the pendant carboxyl group in the polymers with acetate ligand of Mn 12 -Ac. All the polymers...
A series of conjugated copolymers (P1 and P2-CN–P4-CN) were prepared, in which two kinds of side chains were designed: one was the repeating units similar to that of P3HT, with the aim to increase the compatible with PC 61 BM and the hole mobility; another one was the acceptor groups connected with the electron-rich backbone through the conjugated 3,4-ethylenedioxythiophene bridge, in order...
A series of new linear π-conjugated polymers have been synthesized via Suzuki coupling of (1Z, 3Z)-1,4-dibromo-1,4-diaryl-buta-1,3-diene with aromatic diborates. The structures were characterized by NMR spectroscopy, IR spectroscopy and GPC. All of them exhibit good thermal stability with high decomposition temperature over 340 °C. It was found that the absorption and emission of the polymers can...
Two fluorene-based alternating copolymers P1 and P2 with the N,N-diethylaniline pendent group in different contents on the polymer backbone were synthesized through Suzuki Coupling Reaction, and were fully characterized by 1 H NMR, elemental analysis, and gel-permeation chromatography (GPC). Photophysical studies show that changes of the contents of the N,N-diethylaniline groups have little...
In this paper, a new series of PVK-based nonlinear optical (NLO) polymers were successfully synthesized, in which different isolation moieties (from the small to large size) were bonded to the NLO chromophore moieties. All the polymers were well characterized, and the obtained results demonstrated that the polymers exhibited improved solubility and processibility, and good optical transparency upon...
For the first time, a new disubstituted polyacetylene (P1) was utilized to sense α-amino acids based on a “turn-on” model, through an indirect approach. Thus, first, the strong blue fluorescence of P1 was quenched by trace copper ions efficiently, then the addition of α-amino acids to the P1/Cu 2+ complex could recover the strong fluorescence of P1 to report the presence of α-amino acids....
A novel fluorene-based copolymer with aza-15-crown-5 as pendant group was synthesized by Suzuki-coupling reaction, and characterized by 1 H NMR, 13 C NMR, EA, and GPC. The polymer was brightly blue emissive in common organic solvents, such as CHCl 3 , CH 2 Cl 2 , and THF. Fluorescent titration experiments carried out in THF–MeOH system indicate that the polymer...
Based on control experiments, a new series of second-order nonlinear optical polymers with fluorene moieties as isolation spacers were successfully prepared. In the polymers, the chromophore moieties were embedded into the polymer backbone with one position at the donor side, and another point in the π bridge. Different acceptors were used to construct the push–pull structure of chromophore moieties,...
A novel fluorene-based copolymer P 1 with diphenyl urea as pendent group, as well as its analogous copolymer P 2 without urea group for comparison, were synthesized by Suzuki-coupling reaction, and characterized by 1 H NMR, EA, IR and GPC. The polymers were brightly blue emissive in THF, DMF, or DMSO solution. Anion titration experiments carried out in THF indicate that the...
A series of main-chain polyurethanes containing sulfonyl-based NLO chromophores in the polymer backbone were prepared, the subtle structure of the chromophore moieties could be easily modified to adjust the property of the resultant polymers. The polymers exhibit improved stability of their enhanced NLO effects, besides their good processability, thermal stability, and relatively good transparency...
With the aim to control nonlinear optical (NLO) effects of polyurethanes, especially to efficiently translate the fixed μβ values of the organic chromophore to possibly higher macroscopic NLO activities of polymers, a facile synthetic strategy, consisting of the postazo coupling and esterification reactions, was developed to prepare a series of second-order nonlinear optical polyurethanes (P2–P5)...
This paper reports the synthesis and magnetism of a new polymer–inorganic intercalation nanocomposite based on a C 60 -containing poly(ethylene oxide) (C 60 –PEO) into layered MnPS 3 , which is characterized by XRD, IR and thermal analyses. The lattice expansion (Δd) of the intercalation nanocomposite is about 9.3Å indicating the successful intercalation. And the charge balance...
Three new hyperbranched polymers (P1–P3) were prepared by copolymerization of tribromoaryl moieties (triphenylamine, carbazole and fluorene moieties) with 9,9-dihexylfluorene-2,7-bis(trimethyleneborate) from “A 2 +B 3 ” approach based on Suzuki polycondensation reaction. They are soluble in common organic solvents, and exhibit good thermal stable luminescence. Interestingly, unlike...
Three hyperbranched polymers (P1–P3) containing second-order nonlinear optical chromophores were synthesized by copolymerization of aromatic dialdehydes (carbazole, triphenylamine or benzene moieties) with sulfonyl-based chromophores attached with three active methylene groups, from “A 2 +B 3 ” approach based on simple Knoevenagel reaction. For comparison, their corresponding linear...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.