Template-controlled on-surface synthesis of a lanthanide supernaphthalocyanine and its open-chain polycyanine counterpart.,Nature Communications

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Template-controlled on-surface synthesis of a lanthanide supernaphthalocyanine and its open-chain polycyanine counterpart.
Nature Communications ( IF 14.7 ) Pub Date : 2019-11-06 , DOI: 10.1038/s41467-019-13030-7
Qitang Fan ₁ , Jan-Niclas Luy ₁ , Martin Liebold ₁ , Katharina Greulich ₁ , Malte Zugermeier ₁ , Jörg Sundermeyer ₁ , Ralf Tonner ₁ , J Michael Gottfried ₁

Affiliation

Phthalocyanines possess unique optical and electronic properties and thus are widely used in (opto)electronic devices, coatings, photodynamic therapy, etc. Extension of their π-electron systems could produce molecular materials with red-shifted absorption for a broader range of applications. However, access to expanded phthalocyanine analogues with more than four isoindoline units is challenging due to the limited synthetic possibilities. Here, we report the controlled on-surface synthesis of a gadolinium-supernaphthalocyanine macrocycle and its open-chain counterpart poly(benzodiiminoisoindoline) on a silver surface from a naphthalene dicarbonitrile precursor. Their formation is controlled by the on-surface high-dilution principle and steered by different metal templates, i.e., gadolinium atoms and the bare silver surface, which also act as oligomerization catalysts. By using scanning tunneling microscopy, photoemission spectroscopy, and density functional theory calculations, the chemical structures along with the mechanical and electronic properties of these phthalocyanine analogues with extended π-conjugation are investigated in detail.

中文翻译：

模板控制的镧系超萘酞菁及其开链多菁对应物的表面合成。

酞菁具有独特的光学和电子特性，因此被广泛用于（光电）电子设备，涂料，光动力疗法等。扩展其π电子体系可以生产具有红移吸收的分子材料，从而具有更广泛的应用范围。然而，由于有限的合成可能性，获得具有四个以上异吲哚啉单元的扩展的酞菁类似物是具有挑战性的。在这里，我们报告了从萘二甲腈前体在银表面上可控合成synthesis-超萘酞菁大环及其开链对应的聚（苯并二亚氨基异吲哚啉）。它们的形成受表面高稀释原理控制，并受different金属原子和裸银表面等不同金属模板的控制，它也可以作为低聚催化剂。通过使用扫描隧道显微镜，光发射光谱和密度泛函理论计算，详细研究了这些具有扩展π共轭的酞菁类似物的化学结构以及机械和电子性能。

更新日期：2019-11-06

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