Frontispiece: Triply Linked Porphyrinoids

Photophysical Properties of Aromatic and Antiaromatic Porphyrinoids

Excited-state energy relaxation dynamics of triply linked Zn(II) porphyrin arrays.

In this study, we have investigated the excited-state energy deactivation dynamics of extended π-conjugated molecular systems that consist of competitive electronic and vibrational relaxation processes.

Triply-Bonded OszBrs2- Anion

Treatment of H20sBr6 with 1.5 equiv of CsMe5H in a mixture of 48% HBr and methanol or ethanol at reflux for 3 h gives a brown precipitate which has the empirical formula " ( C ~ M ~ ~ ) Z O S ~ B ~ ~ H " ; actually, this product is the unusual salt [ ( C ~ M ~ ~ ) ~ O S H ] ~ [ O S ~ B ~ ~ ] where the cation is the conjugate acid of decamethylosmocene and the anion contains an Os-Os triple bond...

Interstellar Triply Deuterated Ammonia

Research on interstellar ND3 is reviewed and updated from the discovery papers. Results from observations of a dozen sources at centimeter and submillimeter wavelengths are presented. The two data sets are consistent, but do not constrain the excitation conditions in the ND3emitting gas. The column density ratios of NH3/NH2D, NH2D/ND2H and ND3/ND2H, observed in similar sized beams, are ≈10, and...

Decomposition of Triply Rooted Trees

We give a decomposition of triply rooted trees into three doubly rooted trees. This leads to a combinatorial interpretation of an identity conjectured by Lacasse in the study of the PAC-Bayesian machine learning theory, and proved by Younsi by using the Hurwitz identity on multivariate Abel polynomials. Let [n] = {1, 2, . . . , n}. We also give a bijection between the set of functions from [n +...