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'abstract_inverted_index': {'Resonant': [0], 'Raman': [1, 24, 38, 54], 'spectra': [2], 'of': [3, 22, 52, 60], 'highly': [4], 'oriented': [5], 'trans': [6], 'polyacetylene': [7], 'have': [8, 27], 'been': [9, 28], 'obtained': [10], 'for': [11, 30], 'different': [12], 'scattering': [13, 44], 'configurations': [14], 'at': [15], 'various': [16], 'exciting': [17], 'wavelengths.': [18], 'The': [19, 34], 'polarization': [20], 'properties': [21], 'the': [23, 31, 37, 43, 50, 53], 'active': [25], 'phonons': [26], 'determined': [29], 'first': [32], 'time.': [33], 'changes': [35], 'in': [36], 'bandshapes': [39], 'observed': [40], 'upon': [41], 'changing': [42], 'configuration': [45], 'seem': [46], 'to': [47], 'imply': [48], 'that': [49], 'dispersion': [51], 'bands': [55], 'originates': [56], 'from': [57], 'a': [58], 'distribution': [59], 'conjugation': [61], 'lengths.': [62]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1970508066', 'counts_by_year': [{'year': 2021, 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