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isotope tracer study. J Am Chem Soc 105:6529–6531
35. Ng FTT, Rourke CR, Lynn J (1992) Solid superacid catalysts for methane conversion and
alkylation. Stud Surf Sci Catal 73:91–97
36. Siskin M (1976) Strong acid chemistry. 3. Alkane-alkene alkylations in hydrofluoric acidtantalum pentafluoride. Evidence for the presence of ethyl(1+) ion in solution. J Am Chem
Soc 98:5413–5414
37. Baba T, Sawada H (2002) Conversion of methane into higher hydrocarbons in the presence
of ethylene over H-ZSM-5 loaded with silver cations. Phys Chem Chem Phys 4:3919–3923
38. Wang W, Seiler M, Hunger M (2001) Role of surface methoxy species in the conversion of
methanol to dimethyl ether on acidic zeolites investigated by in situ stopped-flow MAS NMR
spectroscopy. J Phys Chem B 105:12553–12558
39. Wang W, Hunger M (2008) Reactivity of surface alkoxy species on acidic zeolite catalysts.
Acc Chem Res 41:895–904
40. Wang W, Buchholz A, Seiler M, Hunger M (2003) Evidence for an initiation of the methanolto-olefin process by reactive surface methoxy group on acidic zeolite catalysts. J Am Chem
Soc 125:15260–15267
41. Jiang Y, Hunger M, Wang W (2006) On the reactivity of surface methoxy species in acidic
zeolites. J Am Chem Soc 128:11679–11692
42. Ono Y, Mori T (1981) Mechanism of methanol conversion into hydrocarbons over ZSM-5
zeolite. J Chem Soc Faraday Trans 1(77):2209–2221
43. Beyer H, Jacobs PA, Uytterhoeven JB (1976) Redox behaviour of transition metal ions in
zeolites. Part 2—Kinetic study of the reduction and reoxidation of silver-Y zeolites. J Chem
Soc Faraday Trans 1 72:674–685
44. Reikert L (1969) Redox equilibria in zeolites. Ber Bunsen-Ges 73:331–338
45. Gellens LR, Mortier WJ, Uytterhoeven JB (1981) On the nature of the changed silver clusters
in zeolites of type A, X and Y. Zeolites 1:11–18
46. Jacobs PA, Uytterhoeven JB, Beyer HK (1977) Redox behaviour of transition metal ions in
zeolites. Part 6—Reversibility of the reduction reaction in silver zeolites. J Chem Soc Faraday
Trans 1 73:1755–1762
47. White JL, Jelli AN, André JM, Fripiat JJ (1967) Perturbation of OH groups in decationated
Y-zeolites by physically adsorbed gases. Trans Faraday Soc 1(63):461–475
48. Gellens LR, Mortier WJ, Schoonheydt RA, Uytterhoeven JB (1981) The nature of the changed
silver clusters in dehydrated zeolites of type A. J Phys Chem 85:2783–2788
49. Xu B, Kevan L (1991) Formation of silver ionic clusters and silver metal particles in zeolite
rho studied by electron spin resonance and far-infrared spectroscopies. J Phys Chem 95:1147–
1151
50. Sun T, Seff K (1994) Silver clusters and chemistry in zeolites. Chem Rev 94:857–870
51. Baker MD, Ozin GA, Godber J (1985) Direct probe Fourier transform far-infrared spectroscopy of metal atoms, metal ions, and metal clusters in zeolites. Catal Rev—Sci Eng
27:591–651
52. Jacobs PA, Uytterhoeven JB, Beyer HK (1979) Some unusual properties of activated and
reduced AgNaA zeolites. J Chem Soc Faraday Trans 1(75):56–64
53. Gellens LR, Mortier WJ, Uytterhoeven JB (1981) Oxidation and reduction of silver in zeolite
Y: a structural study. Zeolites 1:85–90
54. Kim Y, Seff K (1987) Silver clusters formation in large cavity of zeolite A. Crystal structure
of Ag4.6Na7.4Si12Al12O48 dehydrated and treated with hydrogen at 350 °C. J Phys Chem
91:668–671
55. Kim Y, Seff K (1987) Crystal structure of fully dehydrated partially Ag + -exchanged zeolite
4A, Ag 7.6 Na 4.4 -A. Silver ions prefer 6-ring sites. One Ag + ion is reduced. J Phys Chem
91:671–674
56. Tsutsumi K, Takahashi H (1972) The formation of metallic silver in silver-form zeolites. Bull
Chem Soc Jpn 45:2332–2337
217
34. Olah GA, Felberg JD, Lammertsma K (1983) Electrophilic reactions at single bonds. 18.
Heterogeneous gas-phase ethylation of methane with ethylene over solid superacids. A 13 C
isotope tracer study. J Am Chem Soc 105:6529–6531
35. Ng FTT, Rourke CR, Lynn J (1992) Solid superacid catalysts for methane conversion and
alkylation. Stud Surf Sci Catal 73:91–97
36. Siskin M (1976) Strong acid chemistry. 3. Alkane-alkene alkylations in hydrofluoric acidtantalum pentafluoride. Evidence for the presence of ethyl(1+) ion in solution. J Am Chem
Soc 98:5413–5414
37. Baba T, Sawada H (2002) Conversion of methane into higher hydrocarbons in the presence
of ethylene over H-ZSM-5 loaded with silver cations. Phys Chem Chem Phys 4:3919–3923
38. Wang W, Seiler M, Hunger M (2001) Role of surface methoxy species in the conversion of
methanol to dimethyl ether on acidic zeolites investigated by in situ stopped-flow MAS NMR
spectroscopy. J Phys Chem B 105:12553–12558
39. Wang W, Hunger M (2008) Reactivity of surface alkoxy species on acidic zeolite catalysts.
Acc Chem Res 41:895–904
40. Wang W, Buchholz A, Seiler M, Hunger M (2003) Evidence for an initiation of the methanolto-olefin process by reactive surface methoxy group on acidic zeolite catalysts. J Am Chem
Soc 125:15260–15267
41. Jiang Y, Hunger M, Wang W (2006) On the reactivity of surface methoxy species in acidic
zeolites. J Am Chem Soc 128:11679–11692
42. Ono Y, Mori T (1981) Mechanism of methanol conversion into hydrocarbons over ZSM-5
zeolite. J Chem Soc Faraday Trans 1(77):2209–2221
43. Beyer H, Jacobs PA, Uytterhoeven JB (1976) Redox behaviour of transition metal ions in
zeolites. Part 2—Kinetic study of the reduction and reoxidation of silver-Y zeolites. J Chem
Soc Faraday Trans 1 72:674–685
44. Reikert L (1969) Redox equilibria in zeolites. Ber Bunsen-Ges 73:331–338
45. Gellens LR, Mortier WJ, Uytterhoeven JB (1981) On the nature of the changed silver clusters
in zeolites of type A, X and Y. Zeolites 1:11–18
46. Jacobs PA, Uytterhoeven JB, Beyer HK (1977) Redox behaviour of transition metal ions in
zeolites. Part 6—Reversibility of the reduction reaction in silver zeolites. J Chem Soc Faraday
Trans 1 73:1755–1762
47. White JL, Jelli AN, André JM, Fripiat JJ (1967) Perturbation of OH groups in decationated
Y-zeolites by physically adsorbed gases. Trans Faraday Soc 1(63):461–475
48. Gellens LR, Mortier WJ, Schoonheydt RA, Uytterhoeven JB (1981) The nature of the changed
silver clusters in dehydrated zeolites of type A. J Phys Chem 85:2783–2788
49. Xu B, Kevan L (1991) Formation of silver ionic clusters and silver metal particles in zeolite
rho studied by electron spin resonance and far-infrared spectroscopies. J Phys Chem 95:1147–
1151
50. Sun T, Seff K (1994) Silver clusters and chemistry in zeolites. Chem Rev 94:857–870
51. Baker MD, Ozin GA, Godber J (1985) Direct probe Fourier transform far-infrared spectroscopy of metal atoms, metal ions, and metal clusters in zeolites. Catal Rev—Sci Eng
27:591–651
52. Jacobs PA, Uytterhoeven JB, Beyer HK (1979) Some unusual properties of activated and
reduced AgNaA zeolites. J Chem Soc Faraday Trans 1(75):56–64
53. Gellens LR, Mortier WJ, Uytterhoeven JB (1981) Oxidation and reduction of silver in zeolite
Y: a structural study. Zeolites 1:85–90
54. Kim Y, Seff K (1987) Silver clusters formation in large cavity of zeolite A. Crystal structure
of Ag4.6Na7.4Si12Al12O48 dehydrated and treated with hydrogen at 350 °C. J Phys Chem
91:668–671
55. Kim Y, Seff K (1987) Crystal structure of fully dehydrated partially Ag + -exchanged zeolite
4A, Ag 7.6 Na 4.4 -A. Silver ions prefer 6-ring sites. One Ag + ion is reduced. J Phys Chem
91:671–674
56. Tsutsumi K, Takahashi H (1972) The formation of metallic silver in silver-form zeolites. Bull
Chem Soc Jpn 45:2332–2337