Optical properties of highly planar diketopyrrolopyrrole derivatives fixed by coordinate bonds
摘要:
Diketopyrrolopyrrole (DPP) derivatives bearing 2-pyridyl groups were synthesized, which could serve as anionic N,N'-chelate ligands consisting of two nitrogen atoms of the lactam moieties and the pyridyl groups. Coordination of the DPP ligand to boron and platinum yielded the corresponding DPP complexes. Their crystal structures exhibited coplanar structures between the DPP core and the 2-pyridyl groups, which indicated extended pi-conjugation. The maximum absorption wavelength of the DPP complexes was longer than that of the corresponding DPP ligands. The choice of the introduced element affects the optical properties of the DPP complexes; the platinum complex has a longer absorption wavelength than the boron complex. The theoretical calculation revealed that these absorptions can be attributed to the pi-pi* transition. The introduction of the coordinating elements predominantly lowers the band gap. In addition, the substituent on the 2-pyridyl group can also modulate the energy levels. (C) 2014 Elsevier Ltd. All rights reserved.
The invention relates to novel compounds having the general formula (I), and which compounds are useful to treat a disorder or disease characterized by bronchoconstriction, e.g. COPD and asthma.
The invention relates to novel compounds having the general formula (I), and which compounds are useful to treat a disorder or disease characterized by bronchoconstriction, e.g. COPD and asthma.
BENZENE OR THIOPHENE DERIVATIVE AND USE THEREOF AS VAP-1 INHIBITOR
申请人:Matsukawa Tatsuya
公开号:US20110059957A1
公开(公告)日:2011-03-10
The present invention provides a novel benzene derivative or thiophene derivative useful as a VAP-1 inhibitor, or a medicament for the prophylaxis or treatment of a VAP-1 associated disease and the like, namely, a compound represented by the formula (I): wherein each symbol is as defined in the present specification, or a pharmaceutically acceptable salt thereof.
POLYMERS FUNCTIONALIZED WITH NITRILE COMPOUNDS COMTAINING A PROTECTED AMINO GROUP
申请人:Luo Steven
公开号:US20120059112A1
公开(公告)日:2012-03-08
A method for preparing a functionalized polymer, the method comprising the steps of (i) polymerizing monomer with a coordination catalyst to form a reactive polymer; and (ii) reacting the reactive polymer with a nitrile compound containing a protected amino group.
POLYMERS FUNCTIONALIZED WITH NITRILE COMPOUNDS CONTAINING A PROTECTED AMINO GROUP
申请人:Luo Steven
公开号:US20120296041A1
公开(公告)日:2012-11-22
A method for preparing a functionalized polymer, the method comprising the steps of: (i) polymerizing monomer with an anionic initiator to form a reactive polymer; and (ii) reacting the reactive polymer with a nitrile compound containing a protected amino group, where the protected amino group is directly attached to a moiety selected from the group consisting of acyclic moieties, heterocyclic moieties, and non-aromatic cyclic moieties.