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Icosahedral fullerenes, 60, 61, 66, 70-71, 74-77

Icosahedral harmonics, 420

Icosahedral symmetry, 80-96, 329, 340, 414,

415, 417-419, 744 Icosahedron, 1-12

truncated, 1-12, 60, 61, 294 Icosahedron truncum, 2 Impurities, 40, 41, 43, 540, 561, 586, 606, 659, 673, 676, 683, 709, 807, 817, 850, 904

substitutional, 775 Inclusion complex, 316-319 Indium-tin oxide (ITO), 878, 879, 885 Inelastic neutron scattering (see Neutron inelastic scattering) Inequivalent sites, 179, 181, 246, 255, 258, 259, 391

Infrared spectrum (see IR spectrum) Insolubility, 209, 215 Intercalation compounds carbon nanotubes, 775 fullerene, 7, 224, 225, 234-236, 256,

285-288, 294, 297, 301, 316, 365, 506, 561, 570, 720, 726, 901 graphite, 26, 35, 37-39, 235, 240, 241, 257, 285, 287, 294, 301, 378, 379, 450, 572, 580, 616, 617, 621, 743, 744, 863, 901 graphite/Qo, 450-451 ^60^32» 450 K4CmC32, 450, 451 MoS2, 235 staging, 39

transition metal dichalcogenides, 241, 301, 743

Interfacial strain, 277 Intergalactic medium, 3 Intermolecular charge transport, 441-443, 556-573

Intermolecular distance (see also Bond lengths), 199, 203, 205, 233 Intermolecular hopping integral, 504, 561 Intermolecular modes (see Vibrational modes) Internal friction, 192, 608 Interstellar dust, 6

Interstitial sites, 235, 236, 450, 506, 881 Interstitial voids, 234, 236, 301 Intersystem crossing, 464, 467, 472, 473, 481, 484-485, 487-488, 680, 872 quantum efficiency, 483-485, 488, 547 Inverse photoemission spectroscopy (IPES)

(see Photoemission) Inversion layer, 882

Inversion symmetry (see also Parity), 62, 70, 72, 81, 85-88, 91, 97, 248, 260, 380, 332, 386, 795 Iodine (see Halogens) Ionic size (see also Alkali metals, Alkaline earths), 236, 238, 243 Ions (see Anions, Cations) Ion implantation, 165-166, 893 Ionization potential, 63, 68, 163, 166, 232,

416, 417, 457, 708, 719 IR spectrum, 3, 6, 7, 88, 89, 108, 215, 229, 248, 258, 296, 331, 336-339, 355, 357, 365, 367, 372-374, 381-386, 464, 492, 511-513, 531, 565, 627, 641, 699, 871, 872

anions, 511-518 C^, 512-516 C^, 512-514, 516 C^, 512-516 Cjo", 513-516 CSj", 512, 516 12C5913C, 343 ^Qo, 343, 344, 346 "Qo, 343, 344, 346 C,0, 356, 390-392

carbon nanotubes, 756, 797, 799, 839, 840,

842-845, 845-850 charged phonon model, 382-385, 386 combination modes, 360, 361, 363, 367, 374, 494

crystal field effects, 356, 363, 372-374 dispersion effects, 373 dopant dependence, 382, 383, 386 doped Qo, 381-387, 523, 524 doping-induced broadening, 383 doping-induced shifts, 381-387, 749 electron-molecular vibration (EMV)

coupling, 382-384, 465, 468, 470, 498 Fiu (Tlu) mode, 88, 90, 213, 333-335, 356, 357, 372, 373, 381-387, 403, 478, 483, 493, 494, 518, 524, 526 vibronic, 475, 476 far IR, 524, 530, 627, 629, 637, 638 first-order, 88, 89, 331, 338, 356-358, 361,

362, 365, 481, 494 FTIR spectrum, 493 gas phase, 342, 356

intermolecular vibrations, 347, 352, 494 isotope effect, 108, 342-347, 363, 374 lack of overtones, 360, 361 Lorentz oscillator, 386, 494 mid-IR features, 524, 526-528 mode displacements, 335, 337, 494 oscillator strength, 382-386 phase transition, 372, 374, 386, 494 phototransformed CM, 397, 399, 402 phototransformed C70, 402 pressure-induced broadening, 403, 404 pressure-induced phase, 207, 403, 404 pressure-induced shifts, 403, 404 selection rules, 88, 89, 332, 342, 344, 345,

356, 361, 706, 797, 799 solution spectra, 356

splitting, 373, 374

temperature dependence, 365, 372, 373, 385

TDAE-C«,, 406, 749 transmission, 531, 532 unrenormalized mode frequency, 382 Irreducible representations (see Group theory)

Isolated pentagon rule, 62, 64, 66, 67, 69, 143, 145, 147, 149, 294, 295, 731, 769, 771 Isomers, 907 fullerene, 66, 69, 71-73, 90, 101, 102, 104, 110, 111, 122, 143-145, 202, 229, 310, 331, 390, 432, 436, 437, 452, 453, 655, 671, 672, 694, 703, 731, 771 other molecules, 44-46, 215, 257, 259, 310 Isotopes abundance, 80, 104, 106-108, 114, 153, 354, 654

aCm, 104, 106-108, 341, 639, 641 "C«,, 104, 106-108, 639, 641, 654 K,12^, 639, 641 Kj^Qo, 639, 641 S7Rb3C60, 641 RbjO'C^C,)«, 641 RWQo^C'QoU 641 Isotopic distribution, 106-108, 153, 155-157 Isotopic enrichment, 106, 107, 639-641 Isotopic shifts, 108, 639 Isotopic symmetry lowering, 106, 108, 341-347

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