Preparation of near-infrared absorbing composites comprised of conjugated macroligands on the surface of PbS nanoparticles

Zhang, Jinming; Bahrig, Lydia; Puetz, Andreas; Kanelidis, Ioannis; Lenkeit, Daniel; Pelz, Simon; Hickey, Stephen G.; Klein, Michael F. G.; Colsmann, Alexander; Lemmer, Uli; Eychmüller, Alexander; Holder, Elisabeth

doi:10.1016/j.polymer.2013.08.038

Cited by 3 publications

(3 citation statements)

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“…[24] To afford the dibromo thienylethynyl derivatives (2 a-2 g), the following precursors were brominated at 2-and 5-positions by a brominating agent like N-bromosuccinimide (NBS). [25] Incorporation of alkynyl groups at 2-and 5positions by Sonogashira coupling in DCM yielded 2,5-bis [ethynyl(trimethylsilyl)] derivatives (3 a-3 g). The TMS-termini of thienylethynyl derivatives 3 a-3 g were desilylated using K 2 CO 3 in DCM/MeOH affording the corresponding desired thienylethynyl spacers (4 a--4 g) with À C�CÀ H termini as shown in Scheme 1.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, 3‐cyanothiophene ( 1 f ) was achieved in good yield from 3‐bromothiophene with CuCN in DMF medium . To afford the dibromo thienylethynyl derivatives ( 2 a – 2 g ), the following precursors were brominated at 2‐ and 5‐ positions by a brominating agent like N‐bromosuccinimide (NBS) . Incorporation of alkynyl groups at 2‐ and 5‐ positions by Sonogashira coupling in DCM yielded 2,5‐bis[ethynyl(trimethylsilyl)] derivatives ( 3 a – 3 g ).…”

Section: Resultsmentioning

confidence: 99%

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Role of Substituents at 3‐position of Thienylethynyl Spacer on Electronic Properties in Diruthenium(II) Organometallic Wire‐like Complexes

Roy

Chowdhury

Mishra

et al. 2020

Chemistry An Asian Journal

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A series of organometallic complexes [Cl (dppe) 2 RuÀ C�C-(3-RÀ C 4 H 2 S)-C�CÀ Ru(dppe) 2 Cl] (3-R-C 4 H 2 S = 3substituted thienyl moiety; R =À H, À C 2 H 5 , À C 3 H 7 , À C 4 H 9 , À C 6 H 13 , À OMe, À CN in 5 a-5 g respectively) have been synthesized by systematic variation of 3-substituents at the thienylethynyl bridging unit. The diruthenum(II) wire-like complexes (5 a-5 g) have been achieved by the reaction of thienylethynyl bridging units, HC�C-(3-R-C 4 H 2 S)-C�CH (4 a-4 g) with cis-[Ru(dppe) 2 Cl 2 ]. The wire-like diruthenium(II) complexes undergo two consecutive electrochemical oxidation processes in the potential range of 0.0-0.8 V. Interestingly, the wave separation between the two redox waves is greatly influenced by the substituents at the 3position of the thienylethynyl. Thus, the substitution on 3position of the thienylethynyl bridging unit plays a pivotal role for tuning the electronic properties. To understand the electronic behavior, density functional theory (DFT) calculations of the selected diruthenium wire-like complexes (5 a-5 e) with different alkyl appendages are performed. The theoretical data demonstrate that incorporation of alkyl groups to the thienylethynyl entity leaves unsymmetrical spin densities, thus affecting the electronic properties. The voltammetric features of the other two Ru(II) alkynyl complexes 5 f and 5 g (with À OMe and À CN group respectively) show an apparent dependence on the electronic properties. The electronic properties in the redox conjugate, (5 a +) with K c of 3.9 × 10 6 are further examined by UV-Vis-NIR and FTIR studies, showing optical responses in NIR region along with changes in "À RuÀ C�CÀ " vibrational stretching frequency. The origin of the observed electronic transition has been assigned based on time-dependent DFT (TDDFT) calculations.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Role of Substituents at 3‐position of Thienylethynyl Spacer on Electronic Properties in Diruthenium(II) Organometallic Wire‐like Complexes

Roy

Chowdhury

Mishra

et al. 2020

Chemistry An Asian Journal

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“…As another example Zhang et al synthesized a low band gap polymer containing a thiol end group. This polymer was used to carry out ligand exchange with PbS NCs leading to nanocomposites, which absorbed light in the near‐infrared region . The chelating effect can be further taken advantage of with the use of block copolymers.…”

Section: Compatibilization Of Nanoparticles and Polymersmentioning

confidence: 99%

Morphology Control in Biphasic Hybrid Systems of Semiconducting Materials

Mathias

Fokina

Landfester

et al. 2015

Macromol. Rapid Commun.

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Simple blends of inorganic nanocrystals and organic (semiconducting) polymers usually lead to macroscopic segregation. Thus, such blends typically exhibit inferior properties than expected. To overcome the problem of segregation, polymer coated nanocrystals (nanocomposites) have been developed. Such nanocomposites are highly miscible within the polymer matrix. In this Review, a summary of synthetic approaches to achieve stable nanocomposites in a semiconducting polymer matrix is presented. Furthermore, a theoretical background as well as an overview concerning morphology control of inorganic NCs in polymer matrices are provided. In addition, the morphologic behavior of highly anisotropic nanoparticles (i.e. liquid crystalline phase formation of nanorod-composites) and branched nanoparticles (spatial orientation of tetrapods) is described. Finally, the morphology requirements for the application of inorganic/organic hybrid systems in light emitting diodes and solar cells are discussed, and potential solutions to achieve the required morphologies are provided.

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Enhancing the device performance of a blue light‐emitting copolymer using CdSe/ZnS quantum dots

Mucur

Lenkeit

Kanelidis

et al. 2013

J Polym Sci B Polym Phys

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An alternating triarylamine‐functionalized fluorene‐based copolymer synthesized using a Suzuki–Miyaura cross‐coupling procedure is used as blue emitting layer in polymer light‐emitting diodes (PLEDs). Subsequently, the effects of CdSe/ZnS quantum dots (QDs) on the optoelectronic properties of the copolymer are investigated. Therefore, CdSe/ZnS QDs are embedded into the copolymer matrix and hybrid PLEDs are fabricated. The devices comprised of CdSe/ZnS QDs reveal enhanced performances, yielding about 3.4 times more luminous efficiency than that of the device without QDs. Further enhancement is achieved by using electron transport layer; the luminous efficiency rose from 0.065 to 1.740 cd A−1 for the hybrid PLEDs, corresponding to a superb 27‐fold intensification of the efficiency. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 147–156

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Preparation of near-infrared absorbing composites comprised of conjugated macroligands on the surface of PbS nanoparticles

Cited by 3 publications

References 73 publications

Role of Substituents at 3‐position of Thienylethynyl Spacer on Electronic Properties in Diruthenium(II) Organometallic Wire‐like Complexes

Role of Substituents at 3‐position of Thienylethynyl Spacer on Electronic Properties in Diruthenium(II) Organometallic Wire‐like Complexes

Morphology Control in Biphasic Hybrid Systems of Semiconducting Materials

Enhancing the device performance of a blue light‐emitting copolymer using CdSe/ZnS quantum dots

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