Coordination-driven self-assembly of 1,3,5-benzenetricarboxylate (tma; 1) and oxalato-bridged p-cymeneruthenium(II) building block [Ru2(μ- η4-C2O4)(MeOH)2(η 6-p-cymene)2](O3SCF3)2(2) affords an unusual octanuclear incomplete prism [Ru8(η 6-p-cymene)8(tma)2(μ-η4- C2O4)2(OMe)4](O3SCF 3)2(3), which exhibits a remarkable shape-selective binding affinity for neutral phenolic compounds via hydrogen-bonding interactions (p-cymene = p-iPrC6H4Me). Such a binding was confirmed by single-crystal X-ray diffraction analysis using 1,3,5-trihydroxybenzene as an analyte. © 2010 American Chemical Society.

Shanmugaraju Sankarasekaran

Department of Chemistry

A.K. Bar

P.S. Mukherjee

Indian Institute of Technology Palakkad&nbsp;(IIT Palakkad or IIT PKD) is a public autonomous&nbsp;engineering&nbsp;and&nbsp;research&nbsp;institute located in&nbsp;Palakkad,&nbsp;Kerala. It was&nbsp;one of the five new&nbsp;IITs&nbsp;proposed in the&nbsp;2014 Union budget of India. The campus was inaugurated on 3 August 2015. The institute has 94 faculty, 978 students, and 63 non-teaching staffs.

IT Palakkad currently offers four-year Bachelor of Technology (B.Tech) and two years MS programmes in 8 different engineering disciplines including&nbsp;Computer Science, Electrical, Mechanical, Civil among others.

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IIT Palakkad

Inorganic Chemistry

Coordination-driven self-assembly of binuclear half-sandwich p-cymene ruthenium(II) complexes [Ru 2(μ-η 4-C 2O 4)(MeOH) 2(η 6-pcymene) 2](O 3SCF 3) 2 (1a) or [Ru 2(μ-η 4-N,N'-diphenyloxamidato)(MeOH) 2(η 6-p-cymene) 2](O 3SCF 3) 2 (1b) separately with an imidazole-based tetratopic donor L in methanol affords two tetranuclear metallamacrocycles 2a and 2b, respectively. Conversely, the similar combination of L with 2,5-dihydroxy-1,4- benzoquinonato (dhbq) bridged binuclear complex [Ru 2(μ- η 4-C 6H 2O 4)(MeOH) 2(η 6-p-cymene) 2](O 3SCF 3) 2 (1c) in 1:2 molar ratio resulted in an octanuclear macrocyclic cage 2c. All the selfassembled macrocycles 2a-2c were isolated as their triflate salts in high yields and were characterized fully by multinuclear ( 1H, 13C and 19F) NMR, infrared (IR) and electrospray ionization mass spectrometry (ESIMS). In addition, the molecular structure of macrocycle 2a was established unequivocally by single-crystal X-ray diffraction analysis and adopts a tetranuclear rectangular geometry with the dimensions of 5.53 Å × 12.39 Å. Furthermore, the photo-and electrochemical properties of these newly synthesized assemblies have been studied by using UV-vis absorption and cyclic voltammetry analysis. © 2012 Shanmugaraju et al.

Journal	Inorganic Chemistry
Publisher	AMER CHEMICAL SOC
ISSN	00201669
Open Access	No