Dalton Transactions

doi: 10.1039/c9dt90077bpmid: 30938398

doi: 10.1039/C9DT90077Bpmid: 30938398

doi: 10.1039/C9DT90078Kpmid: 30938399

doi: 10.1039/c9dt90078kpmid: 30938399

doi: 10.1039/c9dt90079apmid: 30938400

doi: 10.1039/C9DT90079Apmid: 30938400

Alka, A.; Shetti, Vijayendra S.; Ravikanth, Mangalampalli

doi: 10.1039/c9dt00079hpmid: 30775757

Core-modified porphyrinoids or heteroporphyrinoids are a class of porphyrinoids in which one or more core pyrrole nitrogen atom(s) of the macrocycles are replaced predominantly by group-16 atoms such as O, S, Se, and Te. Telluraporphyrinoids are distinct and interesting from the rest of the chalcogenide atom(s) containing porphyrinoids owing to the larger size of Te and the consequent properties arising from it. The telluraporphyrinoid chemistry is only sporadically investigated and the developments are rather slow compared to the other lighter group-16 atom containing porphyrinoids. This perspective presents a concise overview of the developments that have taken place in the field of telluraporphyrinoid chemistry since its inception and includes various aspects such as the synthesis, structure, reactivity, and properties of tellurium-containing porphyrins and other related porphyrinoids such as vacataporphyrins, carbaporphyrins, calixphyrins, and expanded porphyrins.

Green, Joshua P.; Wells, Jordann A. L.; Orthaber, Andreas

doi: 10.1039/c9dt00574apmid: 30810143

We highlight recent advances in organopnictogen chemistry contrasting the properties of lighter and heavier pnictogens. Exploring new bonding situations, discovering unprecedented reactivities and producing fascinating opto-electronic materials are some of the most prominent directions of current organopnicogen research. Expanding the chemical toolbox towards the heavier group 15 elements will continue to create new opportunities to tailor molecular properties for small molecule activation/reactivity and materials applications alike. This frontier article illustrates the elemental substitution approach in selected literature examples.

Kadassery, Karthika J.; Lacy, David C.

doi: 10.1039/c9dt00529cpmid: 30860251

Mn(i) complexes that enable metal–ligand cooperative substrate activation catalyze a range of transformations. Use of MeMn(CO)5 as a synthon in place of typical Mn(CO)5Br was explored and found to be quite versatile, generating catalytically active species in situ by activation of O–H, N–H, and even C–H bonds.

Shuvaev, Sergey; Parker, David

doi: 10.1039/c9dt00411dpmid: 30860244

The hypersensitive 2F5/2 to 2F7/2 transition of Yb3+ can be used to monitor perturbations of the coordination sphere in ytterbium(III) complexes. An envelope of Stark components gives rise to a relatively broad and asymmetric emission band, whilst changes in their relative intensity and energy enable a ratiometric response. We report a new ytterbium complex with a sulphonamide arm that binds reversibly to Yb3+ as a function of pH, giving rise to significant pH dependent changes in the Yb emission spectrum.