Angewandte Chemie International Edition

Mal, Prasenjit; Schultz, David; Beyeh, Kodiah; Rissanen, Kari; Nitschke, Jonathan R.

doi: 10.1002/anie.200890212pmid: N/A

Reversible locking and unlocking is demonstrated by the tetrahedral cage formed in water by a linear diamine, formylpyridine, and iron(II), as described by J. Nitschke, K. Rissanen, and co‐workers in the Communication on page 8297 ff. Addition of acid unlocks the cage, releasing the hydrophobic guest molecule, and subsequent addition of base relocks it. A triamine can be used to dismantle the tetrahedral host structure.

Huber, Michael; Schnepf, Andreas; Anson, Christopher E.; Schnöckel, Hansgeorg

doi: 10.1002/anie.200890213pmid: N/A

Unique amongst metalloid clusters is one described in the Communication from H. Schnöckel et al. on page 8201 ff. A Si centered Al44 structural unit is protected by 12 AlR units to give Si§Al56R′12. The Si atom itself has a coordination number of 4 and the Al atoms in the SiAl44 scaffolding form four Al‐centered cuboctahedra. The formation of this structure by doping with one Si atom is a reminder that care should be taken in the interpretation of the characterization data of such nanoscale metal particles.

doi: 10.1002/anie.200890214pmid: N/A

Li, Chunsen; Zhang, Lixian; Zhang, Chi; Hirao, Hajime; Wu, Wei; Shaik, Sason

doi: 10.1002/anie.200890215pmid: N/A

doi: 10.1002/anie.200890216pmid: N/A

doi: 10.1002/anie.200804463pmid: N/A

Resconi, Luigi

doi: 10.1002/anie.200785619pmid: N/A

Kauffman, George B.

doi: 10.1002/anie.200885643pmid: N/A

Trapp, Oliver

doi: 10.1002/anie.200802807pmid: 18814162

A remarkably high spacial resolution can be achieved by using multiplexing fluorescent sensors in micellar systems to determine position‐dependent proton concentrations which are difficult to determine by other techniques. Such systems coupled with logic elements mimic complex biological systems and can be used as molecular sensing computers. The picture shows a micelle with position‐selective sensors, which give information about the chemical environment by their fluorescence.

Wietor, Jean‐Luc; Sijbesma, Rint P.

doi: 10.1002/anie.200803072pmid: 18798188

“Heal thyself!”: A thermoplastic rubber material has recently been developed that can completely mend itself when the fracture interfaces are rejoined and left to heal for a moderate time. This “smart” rubber is easy to synthesize and displays excellent mechanical properties.