Optical and electronic interaction at metal–organic and organic–organic interfaces of ultra-thin layers of PTCDA and SnPc on noble metal surfaces
Optical and electronic interaction at metal–organic and organic–organic interfaces of ultra-thin layers of PTCDA and SnPc on noble metal surfaces
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贵金属表面 PTCDA 和 SnPc 超薄层金属有机和有机有机界面的光学和电子相互作用
DOI：
10.1016/j.orgel.2013.05.010
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发表时间：
2013
影响因子：
3.2
通讯作者：
T. Fritz
中科院分区：
文献类型：
--
作者：
M. Gruenewald;K. Wachter;M. Meissner;M. Kozlik;R. Forker;T. Fritz
我们研究了贵金属单晶上染料分子3，4，9，10-茂-四羧酸-二酸酐(PTCDA)和锡(II)-酞菁(SNPC)在金属-有机和有机-有机界面上的相互作用机理。用原位差示反射光谱(DRS)对薄膜进行了表征，并用数值算法提取了薄膜的光学函数。首次给出了在Ag(111)面上PTCDA和SNPC薄膜的DRS数据。我们发现，对于PTCDA和SNPC的接触层，在宽广且无结构的吸收光谱中，吸附物与衬底之间的共价相互作用是众所周知的。令人惊讶的是，尽管自由分子的电子结构有很大的不同，但银(111)表面各自的第一单分子层的光谱几乎相同。通过与金属-有机界面电子相互作用弱得多的Au(111)表面的PTCDA和SNPC单分子膜的比较，强调了光谱的特殊性。与接触层不同的是，同一分子在Ag(111)表面的第二层明显地表现出单体行为，只有在与周围分子和衬底的电子和光学耦合很弱的情况下才能观察到这种行为。然而，与惰性云母衬底上获得的光谱相比，仍然存在很弱的面外电子相互作用。我们还给出了用低能电子衍射(LEED)和扫描隧道显微镜(STM)在Au(111)面上的SNPC的结构数据。
We investigate the interaction mechanisms at metal–organic and organic–organic interfaces in highly-ordered ultra-thin layers of the dye molecules 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) and tin(II)-phthalocyanine (SnPc) on single crystalline noble metals. The ultra-thin films are characterized by means of in situ differential reflectance spectroscopy (DRS), followed by an extraction of the optical functions by application of a numerical algorithm. For the first time, DRS data of PTCDA and SnPc films on Ag(111) are presented. We found that for the contact layers of PTCDA and SnPc the well-known covalent interaction between adsorbate and substrate is manifested in broad and structureless absorption spectra. Surprisingly, the optical spectra of the respective first monolayers on Ag(111) are almost identical despite of the rather different electronic structure of the free molecules. The special character of the optical spectra is emphasized by a comparison with PTCDA and SnPc monolayers on Au(111) where the electronic interaction at the metal–organic interface is much weaker. Quite differently from the contact layer, the second layer of the same molecule on Ag(111) clearly shows monomeric behavior which can only be observed if the electronic and optical coupling with the surrounding molecules and the substrate is faint. However, a very weak out-of-plane electronic interaction remains as concluded from the comparison with the spectra obtained on inert mica substrates. We also present structural data acquired with low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) of SnPc on Au(111).
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超薄异分子有机金属界面的电子结构：SnPc/PTCDA/Ag(111)和SnPc/Ag(111)
影响因子：
3.7
作者：
M. Häming;M. Greif;C. Sauer;A. Schöll;F. Reinert
通讯作者：
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影响因子：
3.2
作者：
Forker, Roman;Golnik, Christian;Fritz, Torsten
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Fritz, Torsten
影响因子：
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作者：
Nitsche, R;Fritz, T
通讯作者：
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不同基底上PTCDA薄膜的原位差示反射光谱
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
H. Proehl;R. Nitsche;T. Dienel;K. Leo;T. Fritz
通讯作者：
T. Fritz
影响因子：
1.9
作者：
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通讯作者：
Sokolowski, M.