Thin films derived from giant, tripod-shaped oligophenylenes end-capped with triallylsilyl groups on hydrogen-terminated Si(111) surfaces

Multi‐instrument characterization of the surfaces and materials in microfabricated, carbon nanotube‐templated thin layer chromatography plates. An analogy to ‘The Blind Men and the Elephant’

“…Clearly, many researchers recognize the importance of employing multiple analytical techniques to characterize surfaces and materials . However, to better understand the degree to which this message is being put into practice, we selected 13 papers from nine research groups on the topic of surface modification of hydrogen‐terminated, porous, and scribed silicon with carbon–carbon double bond containing reagents . This is an area in which one of us (MRL) has published .…”

Suzuki–Miyaura monocouplings of p-dibromobiphenyl and substituted p-dibromo(penta-p-phenylenes)

“…14,15 These molecules have been proposed as adsorbates for controlling the orientation and location of individual molecules on nanostructured surfaces. 16 The syntheses of oligo-p-phenylenes usually involves the palladium-catalyzed Suzuki cross coupling of dihaloaryl derivatives as the key-step. The reaction is a flexible, advantageous synthetic method for constructing CeC biaryl bonds under mild reaction conditions, 17 and has been used for a great number of applications in arylearyl bond formation.…”

Synthesis and Covalent Grafting of Tripod‐Shaped Oligo(p‐phenylene)s End‐Capped with Azide Groups

“…The crude was purified by column chromatography (SiO 2 ;c yclohexane/ CH 2 Cl 2 ,9:1) to obtain compound 2b (70 mg, 46 %) as ay ellow oil: IR: ñ = 2123. 24, 2093.35, 1293.04 cm 1, 136.3, 136.1, 132.7, 131.9, 131.8, 131.3, 130.6, 129.2, 128.9, 128.8, 128.1, 118.8, 20.0, 19.9 tButyl (4'''-bromo-2',2''',5',5'''-tetramethyl-[1,1':4',1'':4'',1'''-quaterphenyl]-4-yl)carbamate (11). Under an argon atmosphere, am ixture of 7 (0.90 g, 2.32 mmol), 8 (1.00 g, 2.32 mmol), Pd(PPh 3 ) 4 (0.14 g, 0.12 mmol), KOH (1.96 g, 35.00 mmol), and nBu 4 NBr (0.20 g, 0.61 mmol) were dissolved in ad egassed mixture of toluene/H 2 O (1:1, 100 mL).…”

“…In this work, we have chosen tripodalo ligo(p-phenylene)s as the ideal anisotropic adsorbates for four principal reasons. They are rigid enough to maintain the perpendicular orientation of the functional arm at the focal point of the tripod with respectt ot he surface, [9,10] the functional arm of these tripods can be directly functionalizedo nt he surface, [11] the tripodal oligo(p-phenylene)s are very stable molecules against oxidation, reduction, as well as acidic or basic conditions, being also stable under moderate high temperatures. Consequently,t he biosensing nanostructured device could be used under aw ide range of conditions.…”