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Beskrivelse
In the present volume, an effort has been made to organize and present a comprehensive overview of receptors for cationic guests. This begins with reviews of the various basic complexing systems: podands, crown ethers, lariat ethers, cryptands, and spherands. Natural cation-binding agents are also important hosts in supramolecular chemistry and their chemistry has been extensively studied. The structural aspects of complexation by natural hosts and crown ethers are reviewed separately and the topic is addressed for specific receptor systems within chapters dedicated to specific hosts. The physical chemistry of complexation and transport is reviewed along with the important application of anion activation, sometimes called phase-transfer catalysis. In the second dozen or so chapters are presented overviews of specialized areas such as the formation of alkalides, the development of chemical sensors, chromoionophores, and redox-switchable receptors. The volume concludes with discussions of transition metal complexes of macrocyclic ligands, second-sphere coordination, complexes of organometallics, and finally of fullerenes.Life is full of demands. Appointments, deadlines, obligations, and constant digital chatter occupy every moment and build a mountain of unhealthy stress and tension. Research shows that colouring can be an effective stress reducer, but true rest and peace are found in God. Inspirational adult colouring books by Majestic Expressions incorporate these two ideas in one beautifully illustrated book. Joy to the World features artwork inspired by the wonder of Christmas. Spend some quiet time relaxing as you colour. Be refreshed and renewed as you meditate on the perfect gift of God given to all mankind. Watch each page come alive as you allow your creativity to flow freely, filling the intricate images with the beauty of colour. Take a break from your busy schedule and the stress that accompanies it. The worries of life can wait.