14N nuclear quadrupole resonance studies of 1,8-bis(dimethylamino)naphthalene

Cryogenic stabilization of high vapor pressure samples for surface analysis under ultrahigh vacuum conditions

“…N͔ ϩ hydrogen bridge. [6][7][8]10,12,14 This has been confirmed by ab initio calculation as well as by numerous solution and solid state NMR results and x-ray and neutron diffraction studies. There is not enough space for two hydrogen atoms in the ͓N-H .…”

“…These were analyzed by XPS, as well as by NMR/XRD. 6,8,10,12,14 The spectroscopic and diffractional data clearly confirm the presence of only one proton in the ͓NH . .…”

“…The model used to estimate the energy shifts has already been reported elsewhere. [6][7][8]10,12,14 The results for six protonated species of DMAN and the result for nonprotonated DMAN are summarized in Table I.…”

“…This hydrogen is known to bind between the two aniline/amino type nitrogen atoms into structures that have been confirmed by nuclear magnetic resonance ͑NMR͒ and x-ray diffraction ͑XRD͒ studies. 6,8,10,[12][13][14][15][16] For those involved in studies of proton sponges it is well known ͑both from theoretical and experimental studies͒ that there is only one hydrogen in the ͓N-H . .…”

Synthesis and Infrared Spectroscopic Investigation of Hydrogen-Bonded Complexes between 1,8-Bis(Dimethylamino)Naphthalene and 2,6-Dihydroxynaphthalene in 2:1 and 1:2 Ratios in the Crystalline forms and in Acetonitrile

“…The (NHN + ) hydrogen bond in protonated proton sponge is interesting from both the crystallographic [12][13][14][15][16] and spectroscopic points of view. [17][18][19][20][21][22] DMAN as a strong proton acceptor has been used frequently for the abstraction of a proton from various systems. Consequently the aim of the current contribution was to add new hydrogen-bonded complexes, including the proton sponge DMAN, through the synthesis of 2:1 and 1:2 complexes with DHN.…”