10,000 publications from this institution
A conjugated ladder polymer composed of negatively curved cyclooctatetraene monomer units was synthesized in a single step from bis-zirconacyclopentadienes, resulting in microporosity and high processability.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
In this paper, we propose a simple and efficient token-based protocol that minimizes the {\em delivery-time} while maintaining an acceptable level of reliability. It guarantees a total order for all delivered messages within a group. The novel feature of the protocol is the ability to choose the sites within a group from which acknowledgements are to be received prior to delivery of a message. This choice can be made on a per message basis. The paper also discusses the trade-offs involved in choosing a large set of acknowledgers versus a small set. We analyze the effects of the size of this set on delivery time, availability, and robustness of the system. We also state and prove the properties guaranteed by the protocol.
Ab initio-based high-throughput computing and screening are now being used to search and predict new functional materials and novel compounds. However, systematic experimental validation on the predictions remains highly challenging, yet desired. Careful comparison between computational predictions and experimental results is sparse in the literature. Here we report on a systematic experimental validation on previously presented computational predictions of a novel alkali carbonophosphate family of compounds. We report the successful hydrothermal synthesis and structural characterization of multiple sodium carbonophosphates. The experimental conditions for formation of the carbonophosphates and the computational results are compared and discussed. We also demonstrate topotactic chemical de-sodiation of one of the compounds, indicating the potential use of this novel class of compounds as Li(+) or Na(+) insertion electrodes.
