Table 2.
MOF | Formula | Ligand a) | S BET/S L b) [m2 g−1] | V p c) [cm3 g−1] | d a d) [Å] | d p e) [Å] | f) [mg g−1] | α g) (P/P 0) | CA h) [°] | Ref. |
---|---|---|---|---|---|---|---|---|---|---|
[Cd(O2C‐CH2‐CO2)(H2O)] | [Cd(ma)(H2O)] | H2ma | 6.95 | 100 | ||||||
[Mn(O2C‐(CH2)3‐CO2)] | [Mn(glu)] | H2glu | 6.6 | 100 | ||||||
CPM‐300 | [Zn4O(RR‐cam)3] | RR‐H2cam | 310.5/ 429.9 | 8 | 138.7 | 101 | ||||
CPM‐301 | [Zn4O(RRcam)3][Zn9(btz)12(RR‐cam)3] | RR‐H2cam, Hbtz | 145.0 | 101 | ||||||
MIL‐140A | [ZrO(1,4‐bdc)] | 1,4‐H2bdc | 415/– | 0.18 | 3.2 | – i) | 0.5 | 71 | ||
MIL‐101(Cr) | [Cr3O(H2O)2F(1,4‐bdc)3] | 1,4‐H2bdc | 3124/– | 1.58 | 12, 16 × 14.5 | 29, 34 | 1360 | 0.48 | 102 | |
MIL‐101‐NO2 | [Cr3O(H2O)2F(1,4‐bdc‐2‐NO2)3] | 1,4‐H2bdc‐2‐NO2 | 2146/– | 1.19 | 1060 | 0.47 | 102 | |||
MIL‐68(In) | [In(OH)(1,4‐bdc)] | 1,4‐H2bdc | 1100/– | 0.42 | 6.0–6.4; 16–17 | 320 | 0.58 | 103 | ||
Banasorb‐22 | [(Zn4O)(1,4‐bdc‐2‐CF3O)3] | 1,4‐H2bdc‐2‐CF3O | 1113/– | 80 | 72 | |||||
UiO‐66 | [Zr6O4(OH)4(1,4‐bdc)6] | 1,4‐H2bdc | 1105/– | 0.55 | 7 | 8–11 | 453 | 0.27 | 104 | |
UiO‐66−1,4‐Naphyl | [Zr6O4(OH)4(1,4‐ndc)6] | 1,4‐H2ndc | 757/– | 0.42 | 297 | 0.31 | 104 | |||
UiO‐66‐(C2H5)2 | [Zr6O4(OH)4(1,4‐bdc‐(C2H5)2)6] | 1,4‐H2bdc‐(C2H5)2 | 340/– | 0.16 | 122 | 0.5 | 87 | |||
UiO‐66‐C2F5 | [Zr6O4(OH)4(1,4‐bdc‐C2F5)6] | 1,4‐H2bdc‐C2F5 | 570/– | 0.26 | 252 | 0.6 | 87 | |||
UiO‐66‐(CF3)2 | [Zr6O4(OH)4(1,4‐bdc‐(CF3)2)6] | 1,4‐H2bdc‐(CF3)2 | 630/– | 0.30 | 190 | 0.35 | 87 | |||
UiO‐66‐CH3 | [Zr6O4(OH)4(1,4‐bdc‐CH3)6] | 1,4‐H2bdc‐CH3 | 760/– | 0.32 | 253 | 0.22 | 87 | |||
UiO‐66‐(CH3)2 | [Zr6O4(OH)4(1,4‐bdc‐(CH3)2)6] | 1,4‐H2bdc‐(CH3)2 | 790/– | 0.35 | 279 | 0.38 | 87 | |||
UiO‐66‐CF3 | [Zr6O4(OH)4(1,4‐bdc‐CF3)6] | 1,4‐H2bdc‐CF3 | 815/– | 0.36 | 279 | 0.32 | 87 | |||
MIL‐140B | [ZrO(2,6‐ndc)] | 2,6‐H2ndc | 460/– | 0.18 | 4.0 | % | 0.5 | 71 | ||
MIL(Cr)‐Z1 | [Cr3O(H2O)2F(1,4‐ndc)3] | 1,4‐H2ndc | 2086/– | 1.23 | 6.9 | 23.3 | 318.6 | 0.64 | 105 | |
Al(OH)(1,4‐ndc) | [Al(OH)(1,4‐ndc)] | 1,4‐H2ndc | –/546 | 3.0–7.7 | 165 | 0.47 | 106 | |||
[Cu(1,4‐ndc)(MeOH)] | [Cu(1,4‐ndc)(MeOH)] | 1,4‐H2ndc | –/133.7 | ≈3.8 | 22 | 0.4 | 107 | |||
UiO‐67‐BN | [Zr6O4(OH)4(bn)6] | H2bn | 1416/– | 495 | 0.54 | 108 | ||||
UiO‐67‐4MS | [Zr6O4(OH)4(tmbpd)6] | H2tmbpd | 1153/– | 82 | 109 | |||||
UiO‐66D‐(CF3)2 | [Zr6O4(OH)4(abdc‐(CF3)2)6] | H2abdc‐(CF3)2 | 2180/– | 0.88 | 281 | 0.87 | 87 | |||
NMOF‐1 | [Zn(ope‐C18)(H2O)2] | H2ope‐C18 | ≈3.3 | 16 | ≈0.45 | 160–162 | 110 | |||
IFMC‐29 | [Zn4O(CH3PhTDC)3] | H2CH3PhTDC | 1892/– | 0.64 | 93 | 111 | ||||
MOFF‐1 | [Cu(bpdc‐F8)(MeOH)] | H2bpdc‐F8 | 580/– | 136 | 0.45 | 108 | 112 | |||
Zn(tbip) | [Zn(tbip)] | H2tbip | 256/– | 0.15 | 4.5 | 110 | 0.56 | 113 | ||
Zn‐hfipbb | [Zn(hfipbb)] | H2hfipbb | 287/288.9 | 0.112 | 6.7 | ≈0 | 114, 115 | |||
[Cu(hfipbb)(H2hfipbb)0.5] | [Cu(hfipbb)(H2hfipbb)0.5] | H2hfipbb | 0.07 | 3.5 | 5.1 | 116, 117 | ||||
Fe‐hfipbb | [Fe3O(hfipbb)3] | H2hfipbb | 269.5/– | 0.21 | 8–12.9 | 110 | 118 | |||
MAMS‐2 | [Zn(H2O)(bbpdc)] | H2bbpdc | 2.9–4.6 | 119 | ||||||
UHMOF‐100 | [Cu(tpda)(DMF)] | H2tpda | 660/469 | 1.07 | 5.9 | ≈0 | 177 | 120 | ||
BUT‐66 | [Zr6O4(OH)4(1,3‐bdb)6] | 1,3‐H2bdb | 1096/1291 | 0.46 | 6.0 | 71 | 0.4 | 142.8 | 88 | |
BUT‐67 | [Zr6O4(OH)4(2,7‐ndb)6] | 2,7‐H2ndb | 984/1141 | 0.41 | 7 | 124 | 0.45 | 137.9 | 88 | |
CuMBTC | [Cu3(mbtc)2] | H3mbtc | 1471/– | 0.78 | 8.8–12.7 | 184 | 0.2 | 121 | ||
CuEBTC | [Cu3(ebtc)2] | H3ebtc | 1434/– | 0.65 | 7.8–12.2 | 184 | 0.1 | 121 | ||
BUT‐12 | [Zr6O4(OH)8(H2O)4(ctta)8/3] | H3ctta | 3387/– | 1.52 | 13–21 | 434 | 0.4 | 138.7 | 122 | |
BUT‐13 | [Zr6O4(OH)8(H2O)4(ttna)8/3] | H3ttna | 3948/– | 2.20 | 14–28 | 494 | 0.52 | 118.3 | 122 | |
PESD‐1 | [Zn4(OH)2(btmb)2(DMF)3(MeOH)] | H3btmb | 295/570 | >150 | 123 | |||||
[Pb(H‐BTMB)] | [Pb(Hbtmb)(DMF)] | H3btmb | 155/– | ≈3.3 | 156.4 | 124 | ||||
Cu2(TPTC‐OnHex) | [Cu2(TPTC‐OnHex)] | H4tptc‐onhex | 1083/1269 | 125 | ||||||
UPC‐21 | [Cu2(pptc)] | H4pptc | 1253.6/– | 145 | 126, 127 | |||||
BUT‐155 | [Cu4(tdhb)] | H8tdhb | 2070/– | 0.82 | 9.5 | 16 | 470 | 0.28 | 128 | |
Znpbdc‐8a | – | pbdc‐8a | 856/– | 9 | 112 | 129 | ||||
FMOF‐1 | {Ag2[Ag4(3,5‐tftz)6]} | 3,5‐Htftz | 810.5/– | 0.324 | 12. × 8 | 6.6 × 4.9 | 158 | 80, 130, 131 | ||
FMOF‐2 | [Ag(Ag3(3,5‐tftz)4)] | 3,5‐Htftz | 18 | 10 | 80 | |||||
MAF‐4/ZIF‐8 | [Zn(2‐mim)2] | 2‐Hmim | –/1870 | 0.67 | 3.2 | 11.4 | 26 | 0.88 | 77 | |
ZIF‐318 | [Zn(2‐mim)(mim‐F3)] | 2‐Hmim, 2‐Hmim‐F3 | 835/1007 | 0.37 | 9.3 | 23 | 0.58 | 68.4 | 132 | |
ZIF‐68 | [Zn(bim)(2‐nim)] | Hbim, 2‐Hnim | 7.5 | 10.3 | 30 j) | 0.52 | 133, 134 | |||
ZIF‐71 | [Zn(4,5‐dcim)2] | 4,5‐Hdcim | 1183/1350 | 0.385 | 4.2 | 16.5 | 4.5 | 0.3 | 79, 133, 135, 136 | |
ZIF‐90 | [Zn(2‐cim)2] | 2‐Hcim | 1280/1466 | 0.485 | 3.5 | 11.2 | 331 | 0.35 | 79, 137 | |
ZIF‐300 | [Zn(2‐mim)0.86(5‐bbim)1.14] | 5‐Hbbim, 2‐Hmim | 420/490 | 6 | 0.58 | 138 | ||||
ZIF‐301 | [Zn(2‐mim)0.94(5‐cbim)1.06] | 5‐Hcbim, 2‐Hmim | 680/825 | 5.8 | 0.52 | 138 | ||||
ZIF‐302 | [Zn(2‐mim)0.67(5‐mbim)1.33] | 5‐Hmbim, 2‐Hmim | 240/270 | 4.5 | 0.53 | 138 | ||||
MAF‐5 | [Zn(2‐eim)2] | 2‐Heim | 2.2–4.9 | 7–10 | ≈0 | 139 | ||||
MAF‐6 | [Zn(2‐eim)2] | 2‐Heim | 1343/1695 | 0.61 | 7.6 | 18.4 | 16.2 | ≈0.5 | 143 | 78 |
[Ni8(L3)6] | [Ni8(OH)4(H2O)2(1,4‐bdp)6] | 1,4‐H2bdp | 1770/– | 990 | 0.65 | 140 | ||||
[Ni8(L4)6] | [Ni8(OH)4(H2O)2(bpdy)6] | H2bpdy | 1920/– | 936 | 0.5 | 140 | ||||
[Ni8(L5)6] | [Ni8(OH)4(H2O)2(bpeb)6] | H2bpeb | 2215/– | ≈24 | 1129 | 0.7 | 140 | |||
[Ni8(L5‐CH3)6] | [Ni8(OH)4(H2O)2(bpdm)6] | H2bpdm | 1985/– | ≈24 | 720 | 0.7 | 140 | |||
[Ni8(L5‐CF3)6] | [Ni8(OH)4(H2O)2(bpdf)6] | H2bpdf | 2195/– | ≈24 | 862 | 0.83 | 140 | |||
Cu‐tebpz | [Cu2(tebpz)] | H2tebpz | 576/– | 0.37 | 4.6–13 | 6 | 0.5 | 141 | ||
Zn(NDI–SEt) | [Zn(ndi–SEt)] | H2ndi–SEt | 888/– | 237 | 0.4 | 142 | ||||
MOFF‐3 | [Cu(bptz‐F8)(H2O)] | H2bptz‐F8 | 37 | 0.3 | 135 | 112 | ||||
MAF‐2 | [Cu(3,5‐etz)] | 3,5‐Hetz | 1.5–4.2 | 9 | 7.4 | 0.5 | 143 | |||
MAF‐7 | [Zn(3‐mtz)2] | 3‐Hmtz | –/1870 | 0.67 | 3.4 | 11.2 | 443 | 0.33 | 77 | |
MAF‐X5 | [Zn(3,5‐dmtz)F] | 3,5‐Hdmtz, F− | 155/195 | 3.6 | 144 | |||||
MAF‐52 | [Cu7Cl(fmtz)6] | Hfmtz | 1023/848 | 0.365 | 7.2 × 8.2, and 7.4 × 8.3 | 10.6 | 0.81 | 148 | 145 | |
SCUTC‐18 | [Zn2(1,4‐bdc)2(2,2′‐dmbpy)] | 1,4‐H2bdc, 2,2′‐dmbpy | 523/– | 8.0 | 146 | |||||
SCUTC‐19 | [Zn2(1,4‐bdc)2(3,3′‐dm‐bpy)] | 1,4‐H2bdc, 3,3′‐dm‐bpy | 458/– | 6.5 | 146 | |||||
oCB‐MOF‐1, | [Zn4O2(1,4‐bdc)2(oCB‐L)2(DMF)2] | 1,4‐H2bdc, oCB‐L | 296/– | 3.2 × 6.4 | 8.6 | 50 | 0.5 | 140 | 147 | |
CID‐1 | [Zn2(ip)2(4,4′‐bpy)2] | Hip, 4,4′‐bpy | 300/– | 5 × 6 | 64k) | 0.61 | 148 | |||
[Cu(bpbtp)(L)(DMF)] | [Cu(bpbtp)(dbbpy‐F18)(DMF)] | H2bpbtp. dbbpy‐F18 | 149 | |||||||
[Cd(NO2‐bdc)(azbpy)] | [Cd(1,4‐NO2‐bdc)(azbpy)] | 1,4‐H2bdc‐2‐NO2, 4,4′‐azbpy | 149 | 0.32 | 150 | |||||
SNU‐80 | [Cu4(pa)8(teia)] | Hpa, teia | 1035/1167 | 0.43 | 10 | 0.5 | 151 | |||
[Cu(bpy)2(otf)2]‐3D | [Cu(4,4′‐bpy)2(otf)2] | 4,4′‐bpy, Hotf | 740/– | 0.27 | 152 | |||||
DMOF‐TM2 | [Zn2(1,4‐bdc‐(CH3)4)2(dabco)] | 1,4‐H2bdc‐(CH3)4, dabco | 1050 | 0.51 | 3.5 | 412 | 0.26 | 153 | ||
MOFF‐2 | [Cu2(bpdc‐F8)2(dabco)] | H2bpdc‐F8, dabco | 444/– | 11 | 0.53 | 151 | 112 | |||
DUT‐30(Zn) | [Zn2(adb)2(dabco)] | H2adb, dabco | 960/– | 0.43 | 366 | 0.95 | 154 | |||
Zn‐dmpc | [Zn4O(dmpc)3] | H2dmpc | 840/– | 0.45 | 4 × 4 | 6 | 437 | 0.83 | 155 | |
MAF‐X8 | [Zn(mpba)] | H2mpba | 1161/1306 | 0.47 | 6.7–8.8 | 156 | ||||
MAF‐X10 | [Zn4O(tmbpz)2(1,4‐bdc)] | 1,4‐H2bdc, H2tmbpz | 2032/– | 0.80 | 6.6 × 5.8 | 9.4 × 9.9 × 13.2 | 157, 158 | |||
MAF‐X12 | [Zn4O(tmbpz)2(1,4‐ndc)] | 1,4‐H2ndc, H2tmbpz | 1787/– | 0.71 | 3.0 × 5.8 | 9.4 × 9.9 × 13.2 | 157 | |||
MAF‐X13 | [Zn4O(tmbpz)2(bpdc)] | H2bpdc, H2tmbpz | 2742/– | 1.01 | 6.6 × 10.0 | 9.4 × 9.9 × 15.9 | 157 | |||
CALF‐25 | – | optp | 385/– | 4.6 × 3.9 | 76.9 | 0.73 | 85 | |||
CALF‐30 | [Cu3(btp‐iPr)2] | H3btp‐iPr | 244/300 | 3.57 | 159 | |||||
CALF‐33‐Et3 | [Cu3(L1‐Et3)2] | H3L1‐Et3 | 842/1030 | 7.2 × 16.1 | 160 |
1,4‐H2bdc‐2‐NO2, 2‐nitro terephthalic acid; 1,4‐H2bdc‐(C2H5)2, 2,5‐diethylterephthalic acid; 1,4‐H2bdc‐C2F5, 2‐pentafluoroethylterephthalic acid; H2ma, propanedioic acid; 1,4‐H2bdc‐(CF3)2, 2,5‐bis(trifluoromethyl)terephthalic acid; 1,4‐H2bdc‐CH3, 2‐methyl‐terephthalic acid; 1,4‐H2bdc‐(CH3)2, 1,4‐H2bdc‐(CH3)4, 2,3,5,6‐tetramethylterephthalic acid; 2,5‐dimethyl‐terephthalic acid; 1,4‐H2bdc‐CF3, 2‐trifluoromethyl‐terephthalic acid; 1,4‐H2bdc‐F4, 2,3,5,6‐tetrafluoroterephthalic acid; 2,6‐H2ndc, 2,6‐naphthalenedicarboxylic acid; H2bn, 1,1′‐binaphthyl‐4,4′‐dicarboxylic acid; 3‐Hmtz, 3‐methyl‐1,2,4‐triazole; 2‐Hmim, 2‐methylimidazole; 2‐Hmim‐F3, 2‐trifluoromethylimidazole; 2‐Hvim, 2‐vinyl‐imidazole; 2‐Hmimc, 4‐methyl‐5‐imidazolecarboxaldehyde; H2hfipbb, 4,4′‐(hexafluoroisopropylidene)bis(benzoic acid); 1,4‐H2bdp, 1,4‐bis(4‐pyrazolyl)benzene; H2bpdy, 4,4′‐buta‐1,3‐diyne‐1,4‐diylbis(1H‐pyrazole); H2bpeb, 1,4‐bis((1H‐pyrazol‐4‐yl)ethynyl)benzene; H2bpdm, 4,4′‐(2,5‐dimethyl‐1,4‐phenylene)bis(ethyne‐2,1‐diyl)bis(1H‐pyrazole); H2bpdf, 4,4′‐(2,5‐bis(trifluoromethyl)‐1,4‐phenylene)bis(ethyne‐2,1‐diyl)bis(1H‐pyrazole); H3btmb, 1,3,5‐tris(3‐carboxyphenyl)benzene; pbdc, polymeric bdc‐acid; oCB‐L, 1,2‐bis{(pyridin‐3‐yl)methanol}‐1,2‐dicarba‐closo‐dodecarborane, Hip, isophthalic acid; 4,4′‐bpy, 4,4′‐bipyridine; 2,2′‐dm‐bpy, 2,2′‐dimethyl‐4,4′‐bipyridine; 3,3′‐dm‐bpy, 3,3′‐dimethyl‐4,4′‐bipyridine; H2bpdc‐F8, 2,2′,3,3′,5,5′,6,6′‐octafluorobiphenyl‐4,4′‐dicarboxylic acid; H2bptz‐F8, 5,5′‐(perfluorobiphenyl‐4,4′‐diyl)bis(1H‐tetrazole); dabco, 1,4‐diazabicyclo[2.2.2]octane; H2bpbtp, 2,5‐bis(perfluorobutyl)terephthalic acid, dbbpy‐F18, 2,5‐bis(perfluorobutyl)‐1,4‐bis(4‐pyridyl)benzene; 4,4′‐azbpy, 4,4′‐azobipyridine; H3btc, 1,3,5‐benzenetricarboxylic acid; H3mbtc, methyl‐1,3,5‐benzenetricarboxylic acid; H3ebtc, ethyl‐1,3,5‐benzenetricarboxylic acid; H3NH2btc, 2‐aminobenzene‐1,3,5‐tricarboxylic acid; H4tptc‐onhex, 2′,5′‐di‐n‐hexyloxy‐[1,1′:4′,1′‐terphenyl]‐3,3″,5,5″‐tetracarboxylic acid; teia, 1,3,5,7‐tetrakis(4‐(2‐ethyl‐1H‐imidazol‐1‐yl)phenyl)‐adamantane; Hpa, pivalic acid; H2tpda, 4,4′‐(3,5‐bis(trifluoromethyl)phenylazanediyl)dibenzoic acid; H2ope‐C18, 4,4′‐(2,5‐bis(octadecyloxy)‐1,4‐phenylene)bis(ethyne‐2,1‐diyl)dibenzoic acid; H2mpba, 4‐(3,5‐dimethylpyrazol‐4‐yl)benzoic acid; H2glu, glutaric acid; H2abdc‐(CF3)2, 2,2′‐bistrifluoromethyl‐4,4′‐azobenzenedicarboxylic acid; H2tmbpz, 3,3′,5,5′‐tetramethyl‐4,4′‐bipyrazole; H2bpdc, biphenyl‐4,4′‐dicarboxylic acid; 3,5‐Hdmtz, 3,5‐dimethyl‐1,2,4‐triazole; Hfmtz, 3‐methyl‐5‐trifluoromethyl‐1,2,4‐triazole; H2adb, 4,4′‐(anthracene‐9,10‐diyl)dibenzoic acid; H3btp‐iPr, isopropyl benzene‐1,3,5‐triyltris(hydrogen phosphonate); optp, octaethyl pyrene‐1,3,6,8‐tetraphosphonate; H2tmbpd, 3,3′,5,5′‐tetrakis(methylthio)biphenyl‐4,4′‐dicarboxylic acid; H2CH3PhTDC, 3‐methyl‐4‐phenylthieno[2,3‐b]thiophene‐2,5‐dicarboxylic acid; H2tbip, 5‐tert‐butyl isophthalic acid; 3,5‐Hetz, 3,5‐diethyl‐1,2,4‐triazole; H2bbpdc, 4′‐tert‐butyl‐biphenyl‐3,5‐dicarboxylic acid; Hotf, trifluoromethanesulfonic acid; H2dmpc, 3,5‐dimethyl‐1H‐pyrazole‐4‐carboxylic acid; H4pptc, pentiptycene‐based tetracarboxylic acid; 2‐Hnim, 2‐nitroimidazole; Hbim, benzimidazole; 2‐Heim, 2‐ethylimidazole; H2tebpz, 3,3′,5,5′‐tetraethyl‐4,4′‐bipyrazole; 3,5‐Htftz, 3,5‐bis(trifluoromethyl)‐1,2,4‐triazole; 4,5‐Hdcim, 4,5‐dichloroimidazole; 1,3‐H2bdb, 1,3‐di(4‐carboxyphenyl)benzene; 2,7‐H2ndb, 2,7‐di(4‐carboxyphenyl)naphthalene; H3ctta, 5′‐(4‐carboxyphenyl)‐2′,4′,6′‐trimethyl‐[1,1′:3′,1″‐terphenyl]‐4,4″‐dicarboxylic acid; H3ttna, 6,6′,6″‐(2,4,6‐trimethylbenzene‐1,3,5‐triyl)tris(2‐naphthoic acid); H8tdhb, 3,3′,5,5′‐tetrakis(3,5‐dicarboxyphenyl)‐2,2′,4,4′,6,6′‐hexamethylbiphenyl; 2‐Hcim, imidazole‐2‐carboxaldehyde; 5‐Hbbim, 5‐bromobenzimidazol; 5‐Hcbim, 5‐chlorobenzimidazole; 5‐Hmbim, 5‐methylbenzimidazole; Hbtz, 1H‐benzotriazole; RR‐H2cam, (1R,3R)‐1,2,2‐trimethyl‐1,3‐cyclopentanedicarboxylic acid; H2bim, 1,2‐bis((5H‐imidazol‐4‐yl)methylene)hydrazine; 2‐H2bmim, 1,2‐bis((2‐methyl‐1H‐imidazol‐4‐yl)methylene)hydrazine; DIFP, diisopropylfluorophosphate; DES, diethylsulfide; H4tcpp, tetrakis(4‐carboxyphenyl)porphyrin
S BET and S L stand for the BET and Langmuir surface areas, respectively
V p stands for the pore volume
d a stands for the size of the aperture or channel
d p stands for the size of the cavity
stands for the water adsorption capacity near saturation pressure and room temperature unless otherwise specified
α stands for the relative pressure at which half of the water adsorption capacity at saturation pressure is reached; and α are obtained by reference values or by scanning the reported adsorption isotherm with the software ScanIt
CA stands for the water contact angle
Qualitative data were not provided
at 0.7 P/P 0
k) at 0.63 P/P 0.