Search results for: Masnun Naher

Items from 1 to 8 out of 8 results

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Quantum Interference in Mixed‐Valence Complexes: Tuning Electronic Coupling Through Substituent Effects

Daniel P. Harrison, Robin Grotjahn, Masnun Naher, Seyed M. B. H. Ghazvini, more

Angewandte Chemie International Edition > 61 > 45 > n/a - n/a

Whilst 2‐ or 5‐OMe groups on the bridging phenylene ring in [{Cp*(dppe)RuC≡C}₂(μ‐1,3‐C₆H₄)]⁺ have little influence on the electronic structure of this weakly coupled mixed‐valence complex, a 4‐OMe substituent enhances ground state electron delocalization, and increases the intensity of the IVCT transition. Vibrational frequency and TDDFT calculations (LH20t‐D3(BJ), def2‐SVP, COSMO (CH₂Cl₂)) on ([{Cp*(dppe)RuC≡C}...

article

Quanteninterferenz in gemischtvalenten Komplexen: Modifikation elektronischer Kopplung durch Substituenteneffekte

Daniel P. Harrison, Robin Grotjahn, Masnun Naher, Seyed M. B. H. Ghazvini, more

Angewandte Chemie > 134 > 45 > n/a - n/a

In 2‐ und 5‐Position einer Phenylenbrücke eines schwach koppelnden gemischtvalenten [{Cp*(dppe)RuC≡C}₂(μ‐1,3‐C₆H₄)]⁺ Komplexes hat ein OMe‐Substituent nur geringen Einfluss auf dessen Elektronenstruktur. In 4‐Position hingegen erhöht dieser die elektronische Delokalisation im Grundzustand sowie die Intensität des IVCT‐Überganges. Schwingungsfrequenzen und TDDFT‐Berechnungen (LH20t‐D3(BJ), def2‐SVP,...

article

Turning the Tap: Conformational Control of Quantum Interference to Modulate Single‐Molecule Conductance

Feng Jiang, Douglas I. Trupp, Norah Algethami, Haining Zheng, more

Angewandte Chemie > 131 > 52 > 19163 - 19169

Together with the more intuitive and commonly recognized conductance mechanisms of charge‐hopping and tunneling, quantum‐interference (QI) phenomena have been identified as important factors affecting charge transport through molecules. Consequently, establishing simple and flexible molecular‐design strategies to understand, control, and exploit QI in molecular junctions poses an exciting challenge...

article

Turning the Tap: Conformational Control of Quantum Interference to Modulate Single‐Molecule Conductance

Feng Jiang, Douglas I. Trupp, Norah Algethami, Haining Zheng, more

Angewandte Chemie International Edition > 58 > 52 > 18987 - 18993

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A New Series of Conjugated Platinum‐co‐Poly(p‐phenylenebutadiynylene)s Polymers: Syntheses and Photophysical Properties

Md. Kausar Ahmed, Md. Mostafizur Rahman, Masnun Naher, Shawon Shawrier Mehdi, more

Macromolecular Chemistry and Physics > 220 > 8 > n/a - n/a

An efficient route is developed to synthesize a series of platinum‐co‐poly(p‐phenylenebutadiynylene)s (Pt‐co‐PPBs) polymers by stoichiometric mixing of poly(p‐phenylenebutadiynylene)s (PPBs) and platinum bis‐phosphine dichlorides. This synthetic route involves two steps; first, oxidative coupling of diterminal phenyleneethynylenes (PEs) gives low‐molecular‐weight PPBs oligomers HCC(Ph(OR)₂ CCCC)...

article

Acceptor and donor substituted alkoxy(phenyleneethynylenes) (Alkoxy-PEs): Synthesis, thermal, linear and nonlinear optical properties

Md. Khairul Amin, Md. Mostafizur Rahman, Masnun Naher, Tanjila Islam, more

Synthetic Metals > 2017 > 232 > C > 96-102

A series of acceptor and donor substituted bis(alkoxy)phenyl ethynyl oligomers 4,4′-((2,5-alkyoxy-1,4-phenylene)bis(ethyne-2,1-diyl))bis(nitrobenzene) (alkyl=C₄H₉ 3a; C₈H₁₇ 3b and C₁₂H₂₅ 3c) and 4,4′-((2,5-alkyoxy-1,4-phenylene)bis(ethyne-2,1-diyl))bis(methylbenzene) (alkyl=C₄H₉ 4a; C₈H₁₇ 4b and C₁₂H₂₅ 4c) has been synthesized by the palladium catalyzed cross coupling reaction of 1,4-dialkoxy-2,5-diiodobenzene...

article

Synthesis, spectroscopic characterization, thermal and luminescent properties of new organosulfur-functionalized platinum(II) bis(alkenylarylalkynyl) complexes

Md. Mostafizur Rahman, Muhammad Younus, Masnun Naher, Mostafa Kamal Masud, more

Journal of Organometallic Chemistry > 2016 > 818 > C > 185-194

A series of organosulfur-functionalized trans-platinum(II) bis(alkenylarylalkynyl) complexes, having one tolylthio moiety in each alkenyl backbone with general formula trans-[(PEt₃)₂Pt{CC-Ar-CHCH(SC₆H₄CH₃)}₂], (2a–2d), (where, Ar = phenylene, biphenylene, 2,5-dimethylphenylene, and 2,5-dimethoxyphenylene) were synthesized in good to excellent yields with good regioselectivity. As compared to the absorption...

article

Synthesis, Characterization and Catalytic Activities of Palladium(II) Nitroaryl Complexes

Mohammad Maududul Huq, Md. Robiur Rahman, Masnun Naher, Mohammad Mizanur Rahman Khan, more

Journal of Inorganic and Organometallic Polymers and Materials > 2016 > 26 > 6 > 1243-1252

Two palladium(II) nitroaryl complexes trans-[bromo(p-nitrophenyl)bis(triphenylphosphine)palladium(II)] 1 and trans-[bromo(2,4-dinitrophenyl)bis(triphenylphosphine)palladium(II)] 2 have been synthesized. The complexes were characterized by FTIR and NMR (¹H, ¹³C and ³¹P) spectroscopy and elemental analysis. The molecular structure of complex 2, as confirmed by X-ray crystallography, reveals that the...

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