2011年2月21日 · Here, we describe a readily accessible AAAA–DDDD quadruple hydrogen-bonding array that exhibits exceptionally strong binding for a small-molecule hydrogen-bonded complex in a range of...

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Here, we describe a readily accessible AAAA-DDDD quadruple hydrogen-bonding array that exhibits exceptionally strong binding for a small-mol. hydrogen-bonded complex in a range of different solvents (Ka > 3 x 1012 M-1 in CH2Cl2, 1.5 x 106 M-1 in CH3CN and 3.4 x 105 M-1 in 10% vol./vol. DMSO/CHCl3).

2011年2月21日 · The AAAA–DDDD configuration is, therefore, the only one in which all secondary interactions are reinforcing and, as a result, is expected to be the most stable of the six possible...

2013年7月3日 · The X-ray crystal structure of a previously reported extremely strong quadruple NH···N AAAA-DDDD hydrogen-bond array [5·4] (K (a) = 1.5 × 10 (6) M (-1) in CH3CN; K (a) > 3 × 10 (12) M (-1) in CH2Cl2) features four short linear hydrogen bonds.

Here, we describe a readily accessible AAAA–DDDD quadruple hydrogen-bonding array that exhibits exceptionally strong binding for a small-molecule hydrogen-bonded complex in a range of different solvents (K(a) > 3 × 10(12) M(-1) in CH2Cl2, 1.5 × 10(6) M(-1) in CH3CN and 3.4 × 10(5) M(-1) in 10% v/v DMSO/CHCl3).

interactions can be considered part of a strong AAAA-DDDD quadruple hydrogen-bonding array. The NH···N/CH···N AAAA-DDDD motif can be repeatedly switched “on” and “off” in CDCl 3 through successive additions of acid and base. INTRODUCTION While individual hydrogen bonds are generally weak and have

The X-ray crystal structure of a previously reported extremely strong quadruple NH⋯N AAAA-DDDD hydrogen-bond array [5·4] (Ka = 1.5 × 106 M-1 in CH3CN; Ka > 3 × 1012 M-1 in CH2Cl2) features four short linear hydrogen bonds.

Here, we describe a readily accessible AAAA-DDDD quadruple hydrogen-bonding array that exhibits exceptionally strong binding for a small-molecule hydrogen-bonded complex in a range of different solvents (K a>3 × 1012 M-1 in CH 2Cl2, 1.5 × 106 M-1 in CH 3CN and 3.4 × 105 M-1 in 10% v/v DMSO/CHCl3).

2019年12月26日 · These duplexes are readily accessible and are structurally modifiable, rendering them attractive as building blocks for creating heteroduplex constructs. Incorporating poly (ethylene glycol)-decorated benzyl groups into the dicarboxylate, allows formation of hydrogels in the case of 1b - 2c.