67994-94-9

Basic information

• Product Name: 6,7-Dihydro-dipyrido[1,2-a:2',1'-c]pyrazinediiumbishexafluorophosphate
• CAS NO: 67994-94-9
• Molecular Weight: 0
• Mol File: 67994-94-9.mol
• Article Data: 4

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 6,7-Dihydro-dipyrido[1,2-a:2',1'-c]pyrazinediiumbishexafluorophosphate(CAS DataBase Reference)
• NIST Chemistry Reference: 6,7-Dihydro-dipyrido[1,2-a:2',1'-c]pyrazinediiumbishexafluorophosphate(67994-94-9)
• EPA Substance Registry System: 6,7-Dihydro-dipyrido[1,2-a:2',1'-c]pyrazinediiumbishexafluorophosphate(67994-94-9)

Safety Data

• Hazardous Substances Data: 67994-94-9(Hazardous Substances Data)

Upstream product

• 366-18-7 [2,2]bipyridinyl 
• 85-00-7 diquat dibromide 

Relevant articles and documents

Triptycene-derived macrotricyclic polyether containing an anthracene unit as a powerful host for 1,2-bis(pyridium)ethane, diquat and 2,7-diazapyrenium salt

Triptycene-derived macrotricyclic polyether containing an anthracene unit is a powerful host for 1,2-bis(pyridium)ethane, diquat and 2,7-diazapyrenium salt with association constants of the 1:1 complexes at >105 M-1. Crystal structures showed that π-π stacking interactions between the host and the guests play an important role in the formation of the stable complexes. This journal is the Partner Organisations 2014.

Shape-Selective Assemblies of Charge-Transfer Complexes as Molecular Probes for Water Adsorption in Zeolites

The supercage of zeolite-Y and the restricted channels of zeolite-L, mordenite, and mazzite act as shape-selective hosts to a series of brightly colored charge-transfer complexes +, D> assembled in situ by the intercalation of various aromatic donors (D) into the ion-exchanged (colorless) zeolites with different pyridinium acceptors (A+).Upon the deliberate introduction of water (vapor) into the variously colored zeolites, the diffuse reflectance spectra suffer pronounced spectral shifts of the charge-transfer bands, the magnitude of ΔhνCT being uniquely dependent on the molecular size/shape of A+ and D, as well as the dimensions of the zeolite cavities.In accordance with the bond compression model of intermolecular charge-transfer complexes, the bathochromic shifts to lower energies (+ΔhνCT) are ascribed to hyperbaric effects induced by the absorption of water within the constricted channels of zeolite-L, mordenite, and mazzite (but not in the larger supercage of zeolite-Y).The importance of water coordination is also underscored by the unusual hypsochromic effects (-ΔhνCT) that are observed when cyano-substituted pyridinium acceptors o-CP+ and p-CP+ are doped into zeolite-Y (but not into zeolite-L, mordenite, or mazzite).These results thus show that the intermolecular charge-transfer complexes +, D> are shape-selective and can be used as quantitative visual probes for water absorption into zeolite cavities, and they provide the experimental basis for further theoretical analysis.