Published January 16, 2017 | Version v1
Publication Open

Single‐Molecule Conductance Studies of Organometallic Complexes Bearing 3‐Thienyl Contacting Groups

Creators

  • 1. University of Western Australia
  • 2. Lancaster University
  • 3. University of Babylon
  • 4. Durham University
  • 5. University of Liverpool
  • 6. Imperial College London
  • 7. Universidad de Zaragoza
  • 8. National Polytechnic School
  • 9. Instituto de Nanociencia y Materiales de Aragón

Description

The compounds and complexes 1,4-C6 H4 (C≡C-cyclo-3-C4 H3 S)2 (2), trans-[Pt(C≡C-cyclo-3-C4 H3 S)2 (PEt3 )2 ] (3), trans-[Ru(C≡C-cyclo-3-C4 H3 S)2 (dppe)2 ] (4; dppe=1,2-bis(diphenylphosphino)ethane) and trans-[Ru(C≡C-cyclo-3-C4 H3 S)2 {P(OEt)3 }4 ] (5) featuring the 3-thienyl moiety as a surface contacting group for gold electrodes have been prepared, crystallographically characterised in the case of 3-5 and studied in metal|molecule|metal junctions by using both scanning tunnelling microscope break-junction (STM-BJ) and STM-I(s) methods (measuring the tunnelling current (I) as a function of distance (s)). The compounds exhibit similar conductance profiles, with a low conductance feature being more readily identified by STM-I(s) methods, and a higher feature by the STM-BJ method. The lower conductance feature was further characterised by analysis using an unsupervised, automated multi-parameter vector classification (MPVC) of the conductance traces. The combination of similarly structured HOMOs and non-resonant tunnelling mechanism accounts for the remarkably similar conductance values across the chemically distinct members of the family 2-5.

⚠️ This is an automatic machine translation with an accuracy of 90-95%

Translated Description (Arabic)

المركبات والمجمعات 1،4 - C6 H4 (C + C - cyclo -3 - C4 H3 S)2 (2)، trans - [Pt(C + C - cyclo -3 - C4 H3 S)2 (PEt3) 2 ] (3)، trans - [Ru (C + C - cyclo -3 - C4 H3 S)2 (dppe) 2 ] (4 ؛ dppe = 1،2 - bis (diphenylphosphino) ethane) و trans - [Ru (C + C - cyclo -3 - C4 H3 S) 2 {P (OEt) 3 }4 ] (5) التي تتميز بشظية 3 - thienyl كمجموعة تلامس سطحية لأقطاب الذهب الكهربائية تم إعدادها، وتوصيفها بلوريًا في حالة 3-5 ودراستها في المعادن |الجزيئات| الوصلات المعدنية باستخدام كل من طرق كسر مجهر المسح النفقي (S - BTMJ) و STM - I (S) (قياس التيار النفقي (I) كدالة للمسافة (S). تظهر المركبات ملامح توصيل مماثلة، مع ميزة توصيل منخفضة يتم تحديدها بسهولة أكبر من خلال طرق STM - I، وميزة أعلى من خلال طريقة STM - BJ. كما اتسمت خاصية التوصيل المنخفض بالتحليل باستخدام تصنيف متجهي آلي متعدد المعلمات (MPVC) غير خاضع للإشراف لآثار التوصيل. إن الجمع بين HOMOs ذات البنية المتشابهة وآلية النفق غير الرنانة يفسر قيم السلوك المتشابهة بشكل ملحوظ عبر الأعضاء المتميزين كيميائيًا في الأسرة 2-5.

Translated Description (French)

Les composés et complexes 1,4-C6 H4 (C≡ C-cyclo-3-C4 H3 S)2 (2), trans-[Pt(C≡ C-cyclo-3-C4 H3 S)2 (PEt3)2 ] (3), trans-[Ru (C≡ C-cyclo-3-C4 H3 S)2 (dppe)2 ] (4 ; dppe=1,2-bis (diphénylphosphino) éthane) et trans-[Ru (C≡ C-cyclo-3-C4 H3 S) 2 {P (OEt) 3 }4 ] (5) présentant la fraction 3-thiényle comme groupe de contact de surface pour les électrodes en or ont été préparés, caractérisés cristallographiquement dans le cas de 3-5 et étudiés dans des jonctions métal|molécule|métal en utilisant à la fois les méthodes de jonction de rupture de microscope à effet tunnel à balayage (STM-BJ) et STM-I (s) (mesure du courant d'effet tunnel (I) en fonction de la distance (s)). Les composés présentent des profils de conductance similaires, une caractéristique de faible conductance étant plus facilement identifiée par les méthodes STM-I (s), et une caractéristique supérieure par la méthode STM-BJ. La caractéristique de conductance inférieure a en outre été caractérisée par une analyse utilisant une classification vectorielle multiparamétrique automatisée non supervisée (MPVC) des traces de conductance. La combinaison d'HOMO de structure similaire et d'un mécanisme de tunnellisation non résonant explique les valeurs de conductance remarquablement similaires entre les membres chimiquement distincts de la famille 2-5.

Translated Description (Spanish)

Se han preparado los compuestos y complejos 1,4-C6 H4 (C≡ C-ciclo-3-C4 H3 S)2 (2), trans-[Pt(C≡ C-ciclo-3-C4 H3 S)2 (PEt3 )2 ] (3), trans-[Ru(C≡ C-ciclo-3-C4 H3 S)2 (dppe)2 ] (4; dppe=1,2-bis(difenilfosfino)etano) y trans-[Ru(C≡ C-ciclo-3-C4 H3 S)2 {P(OEt)3 }4 ] (5) con el resto 3-tienilo como grupo de contacto superficial para electrodos de oro, caracterizados cristalógicamente en el caso de 3-5 y estudiados en uniones metal|molécula|metal mediante el uso de los métodos de unión de ruptura con microscopio de barrido (STM-BJ) y STM-I (s) (midiendo la corriente de tunelización (I) en función de la (s) distancia (s)). Los compuestos exhiben perfiles de conductancia similares, con una característica de baja conductancia que se identifica más fácilmente mediante los métodos STM-I, y una característica más alta mediante el método STM-BJ. La característica de menor conductancia se caracterizó además por el análisis utilizando una clasificación vectorial multiparamétrica automatizada y no supervisada (MPVC) de las trazas de conductancia. La combinación de HOMO estructurados de manera similar y el mecanismo de tunelización no resonante explica los valores de conductancia notablemente similares en los miembros químicamente distintos de la familia 2-5.

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Additional details

Additional titles

Translated title (Arabic)
دراسات التوصيل أحادية الجزيء للمجمعات العضوية المعدنية التي تحمل 3مجموعات تلامس ثينيل
Translated title (French)
Études de conductance à molécule unique de complexes organométalliques portant des groupes de contact 3-thiényle
Translated title (Spanish)
Estudios de conductancia de moléculas individuales de complejos organometálicos que llevan grupos decontacto de 3-tienilo

Identifiers

Other
https://openalex.org/W2557775741
DOI
10.1002/chem.201604565

Is supplement to
https://openalex.org/W3212231632 (Other)
https://openalex.org/W2744280499 (Other)
https://openalex.org/W2466854903 (Other)
https://openalex.org/W2329399397 (Other)
https://openalex.org/W2141324475 (Other)
https://openalex.org/W2069002674 (Other)
https://openalex.org/W2065786103 (Other)
https://openalex.org/W2044415628 (Other)
https://openalex.org/W2031150306 (Other)
https://openalex.org/W1969760851 (Other)

GreSIS Basics Section

Is Global South Knowledge
Yes
Country
Ecuador

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