Exploiting the versatile alkyne-based chemistry for expanding the applications of a stable triphenylmethyl organic radical on surfaces

Abstract

Triphenylmethyl organic radicals functionalized with terminal alkyne groups open new avenues for their implementation as multifunctional surfaces.

Spontaneous S–Si bonding of alkanethiols to Si(111)–H: towards Si–molecule–Si circuits

“…[14][15][16] In the last few years, there has been increasing interest in expanding the use of SAMs in nanoelectronics from gold 8 towards semiconducting platforms including GaAs [17][18][19] and Si. [20][21][22][23][24][25] It is anticipated that combining the electrical properties of semiconductors with the chemical diversity of organic molecules, a variety of technological development can be achieved. Silicon, in particular, provides an attractive choice as an electrode because atomically at silicon substrates are commercially available, are widely used in microelectronics industry, and their electronic properties can be controlled via doping and chemical variation.…”

Stability of radical-functionalized gold surfaces by self-assembly and on-surface chemistry

“…2a). 34,37,49 The tting procedure in XPS is driven by specic and detailed chemical and physical arguments, and not by a mere mathematical approach. The curves are described using a Voigt prole, i.e., a convolution of a Gaussian and a Lorentzian prole.…”

“…This can be explained considering the donor-acceptor character of SAM2 (ref. 34) where the simultaneous presence of the radical and the azidomethyl ferrocene unit stands for faster charge delocalization of the core-hole. These differences in the C 1s main line, binding energy and broadening between SAM1 and SAM2 allow using XPS to identify the radical character of the SAMs.…”

“…SAM1 and SAM2 were prepared following the protocol thoroughly described in ref. 34. SAM4 was grown following a twostep reaction: (1) SAM1 was immersed in a 2 mM solution of Bu 4 NOH/THF (freshly distilled) under an argon atmosphere.…”

“…[26][27][28][29][30][31] The ferrocene functionalization makes the molecules interesting for current rectication, as seen in SAMs incorporating ferrocene acting as a redox-active moiety. [32][33][34] We investigated also the formation of radical self-assembled monolayers (SAMs) obtained by using on-surface chemistry.…”