Room‐Temperature Linear Light Upconversion in a Mononuclear Erbium Molecular Complex

Near-infrared→visible light upconversion in a molecular trinuclear d-f-d complex.

Molecular nonlinear-optical (NLO) phenomena are currently being exploited for the design of visible emitting bioprobes with unprecedented properties that result from 1) the transparency of living tissues toward low-energy near-infrared (NIR) incident radiation and 2) the improved focusing of the light from an excitation laser beam within nanometric volumes. Nonresonant multiphoton absorption pr...

Linear, high molecular weight polyethylene from a discrete, mononuclear phosphinoarenesulfonate complex of nickel(II).

A well-defined, homogeneous catalyst, [(Ph)(2-(2',6'-(OMe)(2)-C(6)H(3))-C(6)H(4))P(2-SO(3)-C(6)H(4))]Ni(Ph)PPh(3), in which a single, bulky ortho-biphenyl substituent on the chelating phosphine blocks one axial position, is very active for formation of linear polyethylene (M(n) = 403,000 g mol(-1), M(w)/M(n) = 1.87).

Complex fuzzy linear systems

Highly Efficient Photon Upconversion in Self-Assembled Light-Harvesting Molecular Systems

To meet the world's demands on the development of sunlight-powered renewable energy production, triplet-triplet annihilation-based photon upconversion (TTA-UC) has raised great expectations. However, an ideal highly efficient, low-power, and in-air TTA-UC has not been achieved. Here, we report a novel self-assembly approach to achieve this, which enabled highly efficient TTA-UC even in the pres...

Non-collinear upconversion of infrared light.

Two dimensional mid-infrared upconversion imaging provides unique spectral and spatial information showing good potential for mid-infrared spectroscopy and hyperspectral imaging. However, to extract spectral or spatial information from the upconverted images an elaborate model is needed, which includes non-collinear interaction. We derive here a general theory providing the far field of the upc...